Ok, so this is really confusing me.
For some reason both Photoshop Elements and Acrobat Reader have both managed to lose their icons on my powerbook. They're both just showing up with that default icon that you get when an application doesn't have it's own icon. Reinstalling the application doesn't seem to help, and neither does cleaning out the various cache directories in the system (~/Library/Caches, /Library/Caches, /System/Library/Caches...), or rebooting, or any combination of the three that I've been able to figure out.
Anyone have a clue how to fix this short of a clean reinstall of the system?