My PowerBook G4 15" 1.25 SuperDrive has started making any app disappear (ie, "This application has unexpectedly quit.") whenever the app throws up an error or question dialog box. Which, obviously - is quite often! Apps include Safari, iTunes, Software Updater and I even tried reloading 10.3.6 update, but can't because it asks if it's okay to run a program to determine if it's okay to install... I tried repairing disk permissions from the startup DVD (as recommended by several people) to no avail. I also tried to isolate the problem by trashing Safari prefs files, again - to no avail. Oddly, this has only started happening since Friday, and before then I had no problems at all with 10.3.6. I haven't installed anything or changed any major preferences that could have obviously caused this. Also - this is only happening on my profile. I tried another user profile and even created a new one, and on both of these it's fine. I'd rather solve the problem rather than working around it and creating a new profile for me if possible..! Any suggestions? Any help greatly appreciated!!