Some notes:
Almost all int x, int y, int z parameters have been changed to BlockPos class
ForgeDirection has been removed, replaced by net.minecraft.util.EnumFacing.
All FML classes have moved from packet cpw.mods.fml to net.minecraftforge.fml
Fluid Rendering has been disabled for the time being, to be re-evaulated and a test mod created for it.
Minecraft now uses a Model based system for rendering blocks and Items. The intention is to expand the model format to better suit modder's needed once it is evaulated.
As such, The model loaders from Forge have been removed, to be replaced by expanding vanilla's model format.
Metadata has been extracted out in Minecraft to IBlockState, which holds a list of properties instead of magic number metadata. DO NOT listen to the fearmongering, you can do EVERYTHING with block states you could previously with metadata.
Stencil Bits are disabled entirely by for the main Display, Modders must enable and recreate the FrameBuffer if they wish to use Stencil Bits.
Update FML: d075daf
d075daf Merge branch 'master' into snapshot15 Fix up compilation and patching errors
1bd6847 Fix up packages.csv ordering for easier diffing
dd832f2 Update for MCP7.30c - fixes redstone rendering issues
aebf6eb Add in a registry method to allow for alternative TileEntity names- they will be used to support loading maps containing the older definiti
8921cfe Remember to add the new patches!
cd67596 The "ServerStarting" event should now properly crash the server if it fails, so the client will properly exit. Also, added in a "pre-server
e1c6630 Javadoc cleanup
5ce4e31 Fix breaking change
a99c488 Merge branch 'patch-1' of https://github.com/bspkrs/FML into gh-updates
94282c5 Merge branch 'FMLLogFormatter' of https://github.com/donington/FML into gh-updates
7ad8529 Update MCP to MCP7.26a and refresh MCP names
15534ed Update address of the FML repository to the new location in all the files
aa822e3 Fix logical error in comment text
a14ab91 Update license text to make clear that FML is not a way to sidestep MCP licensing.
0165742 Fix mcp conf md5 signatures for the snapshot
26a5b31 FMLLogFormatter: dynamic log level name
cpw