--- Operating System, Graphics card ---
Mac book pro with OSX 10.6.8

--- Blender version with error, and version that worked ---
Blender 2.65a OSX 64bits

--- Short description of error ---
The decimator modifier introduce erros in uv-coordinates if the mesh uses vertex color.

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
Decimate a mesh with uv-coordinates and vertex color, the texture coordinates are destroyed on some parts,
after removing the vertex color, the bug disappear.

Thank you,

Anaël.