weird rendering issue after switching to Win7
 

So, nearly a year after buying new PC and switching to glorious Windows 7 I decided to install 7.62 again. Game works perfectly fine, full details, no lag, almost no crashes. But new weird bug appeared.
http://imageshack.us/photo/my-images/408/shop1m.jpg/
http://imageshack.us/photo/my-images/18/shop2z.jpg/
Clearing RenderedItems folder and restarting game cause this bug to affect different images, so it's likely random. I had no such problem with Win XP.
Official patches, community patches and use of compatibility modes did nothing. Happens in all resolutions, in both full screen and windowed mode.

Ultimately I might keep deleting disorted images and wait for lottery to make proper one, but this may take days if not weeks.
I'm outta ideas.
Anyone?