Ok, sorry for the very long delay, I didn't think I would actually fix this...
In case someone still reads this :
I finally got curious about this bug and actually took the time to read the output of raine when the shaders didn't work with the new nvidia drivers, and there was actually something weird to read ! It was all because there was a bug in nvidia drivers <= version 355.11 which made them to return a buffer of 1 byte for the info log of the shader program when there was nothing to report ! I made a workaround for this and totally forgot about it, but it failed when nvidia fixed this and now the buffer has correctly 0 bytes when nothing to report... !!!
Anyway it means shaders now work correctly for any nvidia drivers, and it could probably affect some other video cards as well.
Those not using shaders don't need to update, this 0.64.12 only fixes shaders, and the fix is very short !