diff --git a/js/filebrowser.js b/js/filebrowser.js
index c203151e1..66db2833c 100644
--- a/js/filebrowser.js
+++ b/js/filebrowser.js
@@ -1,6 +1,6 @@
 /**
  * Filebrowser - Friendica Communications Server
- * 
+ *
  * Copyright (c) 2010-2013 the Friendica Project
  *
  * This program is free software: you can redistribute it and/or modify
@@ -28,7 +28,7 @@
  * 	The event is named
  *
  * 		fbrowser.<type>.[<eventname>]
- * 		
+ *
  * 	with params:
  *
  * 		filemane: filename of item choosed by user
@@ -49,13 +49,13 @@
  *			$(id).value = bbcode;
  *		});
  **/
- 
+
 var FileBrowser = {
 	nickname : "",
 	type : "",
 	event: "",
 	id : null,
-	
+
 	init: function(nickname, type) {
 		FileBrowser.nickname = nickname;
 		FileBrowser.type = type;
@@ -65,18 +65,23 @@ var FileBrowser = {
 			FileBrowser.event = FileBrowser.event + "." + h.split("-")[0];
 			FileBrowser.id = h.split("-")[1];
 		}
-		
+
 		console.log("FileBrowser:", nickname, type,FileBrowser.event, FileBrowser.id );
-		
+
+		$(".error a.close").on("click", function(e) {
+			e.preventDefault();
+			$(".error").addClass("hidden");
+		});
+
 		$(".folders a, .path a").on("click", function(e){
 			e.preventDefault();
 			var url = baseurl + "/fbrowser/" + FileBrowser.type + "/" + this.dataset.folder + "?mode=minimal" + location['hash'];
 			location.href = url;
 		});
-		
+
 		$(".photo-album-photo-link").on('click', function(e){
 			e.preventDefault();
-			
+
 			var embed = "";
 			if (FileBrowser.type == "image") {
 				embed = "[url="+this.dataset.link+"][img]"+this.dataset.img+"[/img][/url]";
@@ -91,31 +96,45 @@ var FileBrowser = {
 				embed,
 				FileBrowser.id
 			]);
-			
+
 		});
-		
+
 		if ($("#upload-image").length)
 			var image_uploader = new window.AjaxUpload(
 				'upload-image',
-				{ action: 'wall_upload/'+FileBrowser.nickname,
+				{ action: 'wall_upload/'+FileBrowser.nickname+'?response=json',
 					name: 'userfile',
-					onSubmit: function(file,ext) { $('#profile-rotator').show(); },
+					responseType: 'json',
+					onSubmit: function(file,ext) { $('#profile-rotator').show(); $(".error").addClass('hidden'); },
 					onComplete: function(file,response) {
+						if (response['error']!= undefined) {
+							$(".error span").html(response['error']);
+							$(".error").removeClass('hidden');
+							$('#profile-rotator').hide();
+							return;
+						}
 						location = baseurl + "/fbrowser/image/?mode=minimal"+location['hash'];
 						location.reload(true);
-					}				 
+					}
 				}
 			);
 
 		if ($("#upload-file").length)
 			var file_uploader = new window.AjaxUpload(
 				'upload-file',
-				{ action: 'wall_attach/'+FileBrowser.nickname,
+				{ action: 'wall_attach/'+FileBrowser.nickname+'?response=json',
 					name: 'userfile',
-					onSubmit: function(file,ext) { $('#profile-rotator').show(); },
+					onSubmit: function(file,ext) { $('#profile-rotator').show(); $(".error").addClass('hidden'); },
 					onComplete: function(file,response) {
+						if (response['error']!= undefined) {
+							$(".error span").html(response['error']);
+							$(".error").removeClass('hidden');
+							$('#profile-rotator').hide();
+							return;
+						}
 						location = baseurl + "/fbrowser/file/?mode=minimal"+location['hash'];
-						location.reload(true);				}				 
+						location.reload(true);
+					}
 				}
 		);
 	}
diff --git a/mod/fbrowser.php b/mod/fbrowser.php
index b2bda8287..e7f4b76d4 100644
--- a/mod/fbrowser.php
+++ b/mod/fbrowser.php
@@ -11,29 +11,29 @@ require_once('include/Photo.php');
  * @param App $a
  */
 function fbrowser_content($a){
-	
+
 	if (!local_user())
 		killme();
 
 	if ($a->argc==1)
 		killme();
-	
+
 	$template_file = "filebrowser.tpl";
 	$mode = "";
 	if (x($_GET,'mode')) {
 		$template_file = "filebrowser_plain.tpl";
 		$mode  = "?mode=".$_GET['mode'];
 	}
-	
-	//echo "<pre>"; var_dump($a->argv); killme();	
-	
+
+	//echo "<pre>"; var_dump($a->argv); killme();
+
 	switch($a->argv[1]){
 		case "image":
 			$path = array( array("", t("Photos")));
 			$albums = false;
 			$sql_extra = "";
 			$sql_extra2 = " ORDER BY created DESC LIMIT 0, 10";
-			
+
 			if ($a->argc==2){
 				$albums = q("SELECT distinct(`album`) AS `album` FROM `photo` WHERE `uid` = %d ",
 					intval(local_user())
@@ -41,9 +41,9 @@ function fbrowser_content($a){
 				// anon functions only from 5.3.0... meglio tardi che mai..
 				$folder1 = function($el) use ($mode) {return array(bin2hex($el['album']),$el['album']);};
 				$albums = array_map( $folder1 , $albums);
-				
+
 			}
-			
+
 			$album = "";
 			if ($a->argc==3){
 				$album = hex2bin($a->argv[2]);
@@ -51,14 +51,14 @@ function fbrowser_content($a){
 				$sql_extra2 = "";
 				$path[]=array($a->argv[2], $album);
 			}
-				
-			$r = q("SELECT `resource-id`, `id`, `filename`, type, min(`scale`) AS `hiq`,max(`scale`) AS `loq`, `desc`  
-					FROM `photo` WHERE `uid` = %d AND (height <= 320 AND width <= 320) $sql_extra
+
+			$r = q("SELECT `resource-id`, `id`, `filename`, type, min(`scale`) AS `hiq`,max(`scale`) AS `loq`, `desc`
+					FROM `photo` WHERE `uid` = %d  $sql_extra
 					GROUP BY `resource-id` $sql_extra2",
-				intval(local_user())					
+				intval(local_user())
 			);
-			
-			function files1($rr){ 
+
+			function files1($rr){
 				global $a;
 				$types = Photo::supportedTypes();
 				$ext = $types[$rr['type']];
@@ -70,16 +70,16 @@ function fbrowser_content($a){
 					$filename_e = $rr['filename'];
 				}
 
-				return array( 
-					$a->get_baseurl() . '/photo/' . $rr['resource-id'] . '-' . $rr['hiq'] . '.' .$ext, 
-					$filename_e, 
+				return array(
+					$a->get_baseurl() . '/photo/' . $rr['resource-id'] . '.' .$ext,
+					$filename_e,
 					$a->get_baseurl() . '/photo/' . $rr['resource-id'] . '-' . $rr['loq'] . '.'. $ext
 				);
 			}
 			$files = array_map("files1", $r);
-			
+
 			$tpl = get_markup_template($template_file);
-			
+
 			$o =  replace_macros($tpl, array(
 				'$type' => 'image',
 				'$baseurl' => $a->get_baseurl(),
@@ -89,16 +89,16 @@ function fbrowser_content($a){
 				'$cancel' => t('Cancel'),
 				'$nickname' => $a->user['nickname'],
 			));
-				
-				
+
+
 			break;
 		case "file":
 			if ($a->argc==2){
 				$files = q("SELECT id, filename, filetype FROM `attach` WHERE `uid` = %d ",
 					intval(local_user())
 				);
-				
-				function files2($rr){ global $a; 
+
+				function files2($rr){ global $a;
 					list($m1,$m2) = explode("/",$rr['filetype']);
 					$filetype = ( (file_exists("images/icons/$m1.png"))?$m1:"zip");
 
@@ -109,12 +109,12 @@ function fbrowser_content($a){
 						$filename_e = $rr['filename'];
 					}
 
-					return array( $a->get_baseurl() . '/attach/' . $rr['id'], $filename_e, $a->get_baseurl() . '/images/icons/16/' . $filetype . '.png'); 
+					return array( $a->get_baseurl() . '/attach/' . $rr['id'], $filename_e, $a->get_baseurl() . '/images/icons/16/' . $filetype . '.png');
 				}
 				$files = array_map("files2", $files);
 				//echo "<pre>"; var_dump($files); killme();
-			
-							
+
+
 				$tpl = get_markup_template($template_file);
 				$o = replace_macros($tpl, array(
 					'$type' => 'file',
@@ -125,18 +125,18 @@ function fbrowser_content($a){
 					'$cancel' => t('Cancel'),
 					'$nickname' => $a->user['nickname'],
 				));
-				
+
 			}
-		
+
 			break;
 	}
-	
+
 	if (x($_GET,'mode')) {
 		return $o;
 	} else {
 		echo $o;
 		killme();
 	}
-	
-	
+
+
 }
diff --git a/mod/wall_attach.php b/mod/wall_attach.php
index 1e63a904c..e11d749a3 100644
--- a/mod/wall_attach.php
+++ b/mod/wall_attach.php
@@ -5,17 +5,22 @@ require_once('include/datetime.php');
 
 function wall_attach_post(&$a) {
 
+	$r_json = (x($_GET,'response') && $_GET['response']=='json');
+
 	if($a->argc > 1) {
 		$nick = $a->argv[1];
 		$r = q("SELECT `user`.*, `contact`.`id` FROM `user` LEFT JOIN `contact` on `user`.`uid` = `contact`.`uid`  WHERE `user`.`nickname` = '%s' AND `user`.`blocked` = 0 and `contact`.`self` = 1 LIMIT 1",
 			dbesc($nick)
 		);
-		if(! count($r))
+		if(! count($r)){
+			if ($r_json) { echo json_encode(['error'=>t('Invalid request.')]); killme(); }
 			return;
+        }
 
-	}
-	else
+	} else {
+		if ($r_json) { echo json_encode(['error'=>t('Invalid request.')]); killme(); }
 		return;
+    }
 
 	$can_post  = false;
 	$visitor   = 0;
@@ -52,12 +57,15 @@ function wall_attach_post(&$a) {
 		}
 	}
 	if(! $can_post) {
+		if ($r_json) { echo json_encode(['error'=>t('Permission denied.')]); killme(); }
 		notice( t('Permission denied.') . EOL );
 		killme();
 	}
 
-	if(! x($_FILES,'userfile'))
+	if(! x($_FILES,'userfile')) {
+		if ($r_json) { echo json_encode(['error'=>t('Invalid request.')]); killme(); }
 		killme();
+	}
 
 	$src      = $_FILES['userfile']['tmp_name'];
 	$filename = basename($_FILES['userfile']['name']);
@@ -72,13 +80,23 @@ function wall_attach_post(&$a) {
 	 */
 
 	if($filesize <=0) {
-		notice(t('Sorry, maybe your upload is bigger than the PHP configuration allows') . EOL .(t('Or - did you try to upload an empty file?')) . EOL);
+		$msg = t('Sorry, maybe your upload is bigger than the PHP configuration allows') . EOL .(t('Or - did you try to upload an empty file?'));
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			notice( $msg. EOL );
+		}
 		@unlink($src);
 		killme();
 	}
 
 	if(($maxfilesize) && ($filesize > $maxfilesize)) {
-		echo sprintf(t('File exceeds size limit of %s'), formatBytes($maxfilesize)) . EOL;
+		$msg = sprintf(t('File exceeds size limit of %s'), formatBytes($maxfilesize));
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL ;
+		}
 		@unlink($src);
 		killme();
 	}
@@ -90,7 +108,12 @@ function wall_attach_post(&$a) {
 	$limit = service_class_fetch($page_owner_uid,'attach_upload_limit');
 
 	if(($limit !== false) && (($r[0]['total'] + strlen($imagedata)) > $limit)) {
-		echo upgrade_message(true) . EOL ;
+		$msg = upgrade_message(true);
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL ;
+		}
 		@unlink($src);
 		killme();
 	}
@@ -119,7 +142,12 @@ function wall_attach_post(&$a) {
 	@unlink($src);
 
 	if(! $r) {
-		echo ( t('File upload failed.') . EOL);
+		$msg =  t('File upload failed.');
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL ;
+		}
 		killme();
 	}
 
@@ -130,14 +158,21 @@ function wall_attach_post(&$a) {
 	);
 
 	if(! count($r)) {
-		echo ( t('File upload failed.') . EOL);
+		$msg = t('File upload failed.');
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL ;
+		}
 		killme();
 	}
 
+	if ($r_json) { echo json_encode(['ok'=>true]); killme(); }
+
 	$lf = "\n";
 
 	echo  $lf . $lf . '[attachment]' . $r[0]['id'] . '[/attachment]' . $lf;
-	
+
 	killme();
 	// NOTREACHED
 }
diff --git a/mod/wall_upload.php b/mod/wall_upload.php
index 44cfa0156..fce28c47d 100644
--- a/mod/wall_upload.php
+++ b/mod/wall_upload.php
@@ -6,26 +6,29 @@ function wall_upload_post(&$a, $desktopmode = true) {
 
 	logger("wall upload: starting new upload", LOGGER_DEBUG);
 
+	$r_json = (x($_GET,'response') && $_GET['response']=='json');
+
 	if($a->argc > 1) {
-	        if(! x($_FILES,'media')) {
-		        $nick = $a->argv[1];
-		        $r = q("SELECT `user`.*, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`  WHERE `user`.`nickname` = '%s' AND `user`.`blocked` = 0 and `contact`.`self` = 1 LIMIT 1",
-			        dbesc($nick)
-		        );
+		if(! x($_FILES,'media')) {
+			$nick = $a->argv[1];
+			$r = q("SELECT `user`.*, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`  WHERE `user`.`nickname` = '%s' AND `user`.`blocked` = 0 and `contact`.`self` = 1 LIMIT 1",
+				dbesc($nick)
+			);
 
-		        if(! count($r))
-                                return;
-		}
-                else {
+			if(! count($r)){
+				if ($r_json) { echo json_encode(['error'=>t('Invalid request.')]); killme(); }
+				return;
+			}
+		} else {
 			$user_info = api_get_user($a);
-		        $r = q("SELECT `user`.*, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`  WHERE `user`.`nickname` = '%s' AND `user`.`blocked` = 0 and `contact`.`self` = 1 LIMIT 1",
-			        dbesc($user_info['screen_name'])
-		        );
-                }
-	}
-	else
+			$r = q("SELECT `user`.*, `contact`.`id` FROM `user` INNER JOIN `contact` on `user`.`uid` = `contact`.`uid`  WHERE `user`.`nickname` = '%s' AND `user`.`blocked` = 0 and `contact`.`self` = 1 LIMIT 1",
+				dbesc($user_info['screen_name'])
+			);
+		}
+	} else {
+		if ($r_json) { echo json_encode(['error'=>t('Invalid request.')]); killme(); }
 		return;
-
+	}
 
 	$can_post  = false;
 	$visitor   = 0;
@@ -62,14 +65,19 @@ function wall_upload_post(&$a, $desktopmode = true) {
 		}
 	}
 
+
 	if(! $can_post) {
+		if ($r_json) { echo json_encode(['error'=>t('Permission denied.')]); killme(); }
 		notice( t('Permission denied.') . EOL );
 		killme();
 	}
 
-	if(! x($_FILES,'userfile') && ! x($_FILES,'media'))
+	if(! x($_FILES,'userfile') && ! x($_FILES,'media')){
+		if ($r_json) { echo json_encode(['error'=>t('Invalid request.')]); killme(); }
 		killme();
+	}
 
+	$src = "";
 	if(x($_FILES,'userfile')) {
 		$src      = $_FILES['userfile']['tmp_name'];
 		$filename = basename($_FILES['userfile']['name']);
@@ -98,6 +106,12 @@ function wall_upload_post(&$a, $desktopmode = true) {
 			$filetype = $_FILES['media']['type'];
 	}
 
+	if ($src=="") {
+		if ($r_json) { echo json_encode(['error'=>t('Invalid request.')]); killme(); }
+		notice(t('Invalid request.').EOL);
+		killme();
+	}
+
 	// This is a special treatment for picture upload from Twidere
 	if (($filename == "octet-stream") AND ($filetype != "")) {
 		$filename = $filetype;
@@ -109,6 +123,7 @@ function wall_upload_post(&$a, $desktopmode = true) {
 
 	// If there is a temp name, then do a manual check
 	// This is more reliable than the provided value
+
 	$imagedata = getimagesize($src);
 	if ($imagedata)
 		$filetype = $imagedata['mime'];
@@ -119,7 +134,12 @@ function wall_upload_post(&$a, $desktopmode = true) {
 	$maximagesize = get_config('system','maximagesize');
 
 	if(($maximagesize) && ($filesize > $maximagesize)) {
-		echo  sprintf( t('Image exceeds size limit of %s'), formatBytes($maximagesize)) . EOL;
+		$msg = sprintf( t('Image exceeds size limit of %s'), formatBytes($maximagesize));
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL;
+		}
 		@unlink($src);
 		killme();
 	}
@@ -131,7 +151,12 @@ function wall_upload_post(&$a, $desktopmode = true) {
 	$limit = service_class_fetch($page_owner_uid,'photo_upload_limit');
 
 	if(($limit !== false) && (($r[0]['total'] + strlen($imagedata)) > $limit)) {
-		echo upgrade_message(true) . EOL ;
+		$msg = upgrade_message(true);
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL;
+		}
 		@unlink($src);
 		killme();
 	}
@@ -141,7 +166,12 @@ function wall_upload_post(&$a, $desktopmode = true) {
 	$ph = new Photo($imagedata, $filetype);
 
 	if(! $ph->is_valid()) {
-		echo ( t('Unable to process image.') . EOL);
+		$msg = t('Unable to process image.');
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL;
+		}
 		@unlink($src);
 		killme();
 	}
@@ -169,7 +199,12 @@ function wall_upload_post(&$a, $desktopmode = true) {
 	$r = $ph->store($page_owner_uid, $visitor, $hash, $filename, t('Wall Photos'), 0, 0, $defperm);
 
 	if(! $r) {
-		echo ( t('Image upload failed.') . EOL);
+		$msg = t('Image upload failed.');
+		if ($r_json) {
+			echo json_encode(['error'=>$msg]);
+		} else {
+			echo  $msg. EOL;
+		}
 		killme();
 	}
 
@@ -192,9 +227,10 @@ function wall_upload_post(&$a, $desktopmode = true) {
 	if (!$desktopmode) {
 
 		$r = q("SELECT `id`, `datasize`, `width`, `height`, `type` FROM `photo` WHERE `resource-id` = '%s' ORDER BY `width` DESC LIMIT 1", $hash);
-		if (!$r)
+		if (!$r){
+			if ($r_json) { echo json_encode(['error'=>'']); killme(); }
 			return false;
-
+		}
 		$picture = array();
 
 		$picture["id"] = $r[0]["id"];
@@ -206,9 +242,12 @@ function wall_upload_post(&$a, $desktopmode = true) {
 		$picture["picture"] = $a->get_baseurl()."/photo/{$hash}-0.".$ph->getExt();
 		$picture["preview"] = $a->get_baseurl()."/photo/{$hash}-{$smallest}.".$ph->getExt();
 
+		if ($r_json) { echo json_encode(['picture'=>$picture]); killme(); }
 		return $picture;
 	}
 
+	if ($r_json) { echo json_encode(['ok'=>true]); killme(); }
+
 /* mod Waitman Gobble NO WARRANTY */
 
 //if we get the signal then return the image url info in BBCODE, otherwise this outputs the info and bails (for the ajax image uploader on wall post)
diff --git a/view/global.css b/view/global.css
index 720ffc530..c2f584003 100644
--- a/view/global.css
+++ b/view/global.css
@@ -194,6 +194,9 @@ key { display: inline; background-color: #eee; color: #666; padding:0.2em; font-
 .fbrowser.file img { display: inline; }
 .fbrowser.file p  { display: inline; white-space: nowrap; }
 .fbrowser .upload { clear: both; padding-top: 1em;}
+.fbrowser .error { background: #ffeeee; border: 1px solid #994444; color: #994444; padding: 0.5em;}
+.fbrowser .error a.close { float: right; font-weight: bold; }
+.fbrowser .error.hidden { display: none; }
 
 a {
   cursor: pointer;
diff --git a/view/templates/filebrowser_plain.tpl b/view/templates/filebrowser_plain.tpl
index 4a50d4ac9..1ebf8a2cc 100644
--- a/view/templates/filebrowser_plain.tpl
+++ b/view/templates/filebrowser_plain.tpl
@@ -13,11 +13,14 @@
 	});
 </script>
 <div class="fbrowser {{$type}}">
+	<div class="error hidden">
+		<span></span> <a href="#" class='close'>X</a>
+	</div>
 
 	<div class="path">
 		{{foreach $path as $p}}<a href="#" data-folder="{{$p.0}}">{{$p.1}}</a>{{/foreach}}
 	</div>
-	
+
 	{{if $folders }}
 	<div class="folders">
 		<ul>
@@ -25,7 +28,7 @@
 		</ul>
 	</div>
 	{{/if}}
-		
+
 	<div class="list">
 		{{foreach $files as $f}}
 		<div class="photo-album-image-wrapper">
@@ -38,11 +41,11 @@
 	</div>
 
 	<div class="upload">
-		<button id="upload-{{$type}}"><img id="profile-rotator" src="images/rotator.gif" alt="{{$wait}}" title="{{$wait|escape:'html'}}" style="display: none;" /> {{"Upload"|t}}</button> 
+		<button id="upload-{{$type}}"><img id="profile-rotator" src="images/rotator.gif" alt="{{$wait}}" title="{{$wait|escape:'html'}}" style="display: none;" /> {{"Upload"|t}}</button>
 	</div>
 </div>
 
 
 	</body>
-	
+
 </html>