Since rev.2 (hans ftw) we have a strange situation where horizon color was being used at Convert time for the WorldInfo background color (and for the fog). However through the Python API only the Rasterizer background color was being updated. On top of that the KX_KetsjiEngine.cpp::SetBackGround was using the WorldInfo bgcolor when render mode was the potato one (TEXTURED). Bottomline, when in potato mode the glClearColor used was the original one in worldinfo, not the API updated one in Rasterized.
Armatures are back
Split screen
Double sided lightning
Ambient lighting
Alpha test
Material IPO support (one per object atm)
Blender materials
GLSL shaders - Python access
Up to three texture samplers from the material panel ( 2D & Cube map )
Python access to a second set of uv coordinates
See http://www.elysiun.com/forum/viewtopic.php?t=58057
(MVert,MFace,etc) off into DNA_meshdata_types.h, to isolate areas
of source that actually edit mesh *data* vs. areas that just edit
mesh object information.