One problem has me scratching my head and the other has me feeling a little sheepish.

Every now and then some of my preferences seem to change. Not all of them, just a couple.
Changing the volume sometimes makes pop noises but when I check Sound preferences the checkbox for giving feedback is unticked (I tick and untick and the pops go away).
My international menu should always have menus for showing the Character Palette and the Keyboard Viewer. Sometimes both of these options disappear (and I have to re-enable them in International preferences). I haven't been fiddling with things that would make these randomly change, at least I don't think so...

The other problem is [SOLVED] some of the toolbar buttons in things like the Finder, ARD, etc. They just look wrong. Examples are:

I had installed CrystalClear interface (Musings from Mars ) and uninstalled it and everything was ok, then I replaced the Extras2.rsrc in the Carbon.framework (yeah, System folder, I know I'm not supposed to touch but I wanted iTunes-like scroll bars in the Finder, instead of those Aqua/Candy ones that are so 2001) and then that was ok for a while, but then I decided to show off and installed the CrystalClear interface again (without the Scrollbar, etc. gui hacks) and uninstalled it and now I'm stuck with these crappy looking buttons.

Any suggestions? I've replaced the Extras2.rsrc file a couple of times to no effect... I think I'm almost out of ideas here.