blender 2.5x vertex painting problem

I still have to keep a blender 2.49 copy in my computer, because if i wanna work with vertex painting, the new versions of blender have a strange behavior( the vertices on another side of view have a sharp edge of paint, not difuse like my brush , a diferent behavior of my view area).
this does not happen on 2.49 and older versions.

Who knows why???

tnks,
Berk

Anybody knows something about that?

Some idea??

I will keep trying guys… I need answer.

SHi… NOBOBY??? BACKING TO MAYA!