getOffset() now falls back to old slower version for CSS layouts which cannot figure out bounding box widths. This fixes the photo and attachment upload buttons for some themes such as vier.

js/ajaxupload.js

@@ -58,6 +58,22 @@
         });
     }    
 
+    // Get offset adding all offsets, slow fall-back method
+    var getOffsetSlow = function(el){
+        var top = 0, left = 0;
+        do {
+            top += el.offsetTop || 0;
+            left += el.offsetLeft || 0;
+            el = el.offsetParent;
+        } while (el);
+        
+        return {
+            left: left,
+            top: top
+        };
+    };
+
+    
     // Needs more testing, will be rewriten for next version        
     // getOffset function copied from jQuery lib (http://jquery.com/)
     if (document.documentElement.getBoundingClientRect){
@@ -79,6 +95,11 @@
                 zoom = (bound.right - bound.left) / body.clientWidth;
             }
 
+            // some CSS layouts gives 0 width and/or bounding boxes
+            // in this case we fall back to the slow method
+            if (zoom == 0 || body.clientWidth == 0)
+                return getOffsetSlow(el);
+            
             if (zoom > 1) {
                 clientTop = 0;
                 clientLeft = 0;
@@ -92,20 +113,7 @@
             };
         };        
     } else {
-        // Get offset adding all offsets 
+      var getOffset = getOffsetSlow;
-        var getOffset = function(el){
-            var top = 0, left = 0;
-            do {
-                top += el.offsetTop || 0;
-                left += el.offsetLeft || 0;
-                el = el.offsetParent;
-            } while (el);
-            
-            return {
-                left: left,
-                top: top
-            };
-        };
     }
     
     /**