I got a really weird problem here that I'm just not getting. At first I thought my netbook's display was somehow bugged out, but I'm led to think this is more of a software bug.
I'm making a website, and it involves PNG images. The image that's causing problems is the background PNG used for the page's body
element. Basically, there's a background image, which "fades" into the generic "black" of the background (hence why I'm using a PNG image for the effect). Now here's the problem, simulated with Paint:
So basically, when I load the page, and have it open in memory anywhere, my desktop looks like the second image. I get weird artifacts on specific spots where there is transparency in the background PNG image (it's like the individual pixels that are certain levels of transparent on the website remain in a "bugged out" state). It doesn't really go away until I close the browser, and re-open it with a fresh page. This happens in both Firefox (16.0.2) and IE9. I ran a full memory diagnostic with no problems.
System is running Windows 7 64-bit Home Premium; AMD C-60 with AMD Vision graphics (HD 6290), display driver version 8.930.13.0 (1/27/2012).
This is seriously one of the weirdest problems I've ever come across. Only thing I can think of is some sort of display driver bug - I haven't had a chance to try it on another system yet.