Go into Tools -> Preferences, then highlight the tab Advanced and go to Fonts. You can change font settings there in Opera.
Doh. I just had a quick look and saw the stuff that changed the html page font preferences or something like that. Well, now I at least know why it changed; I can't choose plain Arial as font anymore (one of those weird things that just happen?) :p
edit: While I'm at it, can anyone tell how I could change my screen's (well the picture i can see on my monitor, damn it's difficult to figure out what the correct terms are in English -_-) xy-position since the upper border is slightly off the screen [=when a window is maximized the _  x buttons aren't fully visible]? When I go to the monitor's front panel menu that particular option is greyed out. Got nVidia if that matters, can't find anything on the nVidia Control Panel though.
Woops, I apologize. I have been extremely busy lately and didn't see your message until now :( I was unable to recall where I got the original desktop background from so I ended up just uploading what I had in my folder~
I'm thinking of switching to linux, but I'm wondering about program compatibility. Can Linux emulate windows, or otherwise run programs made for windows?
EDIT: One big program that I'm wondering about is WoW, does it still work fine on Linux?
EDIT2: I've looked at it a lot more, and I've sorted out compatibility and such. Also, I noticed shortcuts to FireFox in the screenshots, so I'm not very worried about incompatibility issues at this point. Wish me luck!
Windows XP using BBLean and a custom theme I edited myself. Background is the Hubble Ultra Deep Field. The background and theme hasn't changed in at least 3 years. Everything is started from the right click menu or hotkey (the hotkey being Win+R). The foobar2000 layout is modified default that I made when upgrading to 0.9.5, its not skined by BBLean because I've had issues with it and just added it to the ignore list. Yeah I know Trillian sucks but I never even use it anyway I'm just always on it so I'm contactable not that anybody ever does.