I use SnowOSX86 3.6A installed on

Gigabyte EP35-US3L
Intel Core 2 Duo 2.66
4 Gig of 1066 ram
Nvidia Geforge 7300GS

everything works perfect but a little bug.

when I emptying trash, in "Are you sure.." questions empty trash button dimming. you know. but sometimes an graphic error occured and this button blinkink (visible/unvisible) and after that the finder screen / button and fonts are looks like grains and failing to display spotlight.

sorry for my bad english.

What is the main problem for that, kext or QuartzGL problem ?
any suggestions please

here is the pic.