I'm having this issue that makes no sense whatsoever. When I try to set a PNG background on Windows 7 (the same apparently happens with Vista), it converts it to a noticeably lower-quality JPEG. Is there any way to stop it from doing this? I've looked on Google to no avail (everything I've searched comes up with just backgrounds for Windows Vista/Windows 7, or random topics about Compiz Fusion for Linux...) so I'd appreciate if anybody knew how to make Windows Vista/7 force PNG's as backgrounds. Thanks.