Sometimes when I'm running a lot of applications or playing movies, or I let a p2p application run overnight (shareaza) I seem to get this wierd problem where explorer/browser window borders become transparent and show off-color artifacts (missing sections of drop down menus, blacked out buttons, etc). Its as if the msstyle crashes. Hovering over the caption buttons will make them visible again, but this is still annoying. I'm suspecting a graphics memory leak of some sort. Another side effect is when launching a game I get a "Cant initilize graphics" message and need to close all browsers, apps and sometimes force quit explorer itself until it works. Any ideas? Codec related perhaps?