Nothing! I promise
You likely won't believe me, but nothing. It started awhile ago with just some font issues, with random font availability disappearing from random programs. I reinstalled the fonts and that sort of worked. Yesterday all the documents from Mail to Word to PowerPoint lost the availability to use Arial. I ran Onyx and some trial font managers to try and sort the issue out. Later that day all the windows (except iTunes 10) started to appear with the brushed metal look. So today I didn't work much on the computer, but not it is back to the gradient look. Is it possible to change to a brushed metal look via terminal? I am pretty sure I have a bad instal of Snow Leopard, but can't afford the computer down time to reinstall, but it looks like I have a new weekend project.
EDIT: Forgot to add that yesterday the fontd process starting hogging the CPU at 100% then leveled out to ~60%. After cleaning the font cache and restarting, that is when the brushed metal look started.