3dmax 2012 hotfix but the problems is still

[orenvfx]

hi guys

after installing hotfix for 3d max 2012 64bit i still have display issue with 3dmax 2012, in 3dmax 2011 evrything ok.

the problem is when im minimize 3dmax and after im back to max the viewport is disappear and i can see through . and much more little display issue when i minimize material editor and something like this. is this problems is familiar with max 2012?

my gpu card is "gtx 460 2 gb" my driver is update

cpu i7 870

thanx for all