Ok. So I think I messed up my mac. A little while ago I needed to do some work on Visual Studio, and, given that I don't have Leopard nor Bootcamp, I decided to partition my disk and install both of them. It worked just fine. Then I got kind of excited. Using the same method (Partition -> Install OS's) I installed XP, OS X and Ubuntu, then just Ubuntu and OS X, then XP, Ubuntu, SuSe and OS X, and then, I just installed OS X. My problem is that my mac now keeps crashing. I doesn't follow any logic at all; sometimes it crashes with iTunes, sometimes with Firefox, sometimes with Netbeans, with Garageband.... it just keeps crashing and I don't know why. I think I must've screwed up my hard-drive with all the OS install-reinstall-uninstall... Also, I don't know if this helps, but my HD volume is now called "Untitled", when, I remember, it used to be called "Macintosh HD".... Disk permissions are OK and so is the disk (According to Disk Utility). Any help whatsoever will be greatly appreciated by this frustrated chump.