--- Operating System, Graphics card ---
Windows 7 64bits, Nvidia GTX 680

--- Blender version with error, and version that worked ---
Blender 2.68 RC1 and worked with 2.67

--- Short description of error ---
In Blender 2.68 RC1 not working correctly Subsurf UVs with 2.67 .blend files. Crease weight is wrong too.
Subdivide UVs property not working in 2.68 RC1 new files.

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---