I am getting VQ_LOWDISK event entries in my log files, which, after a Google search, seem to indicate that the system thinks it is low on disk space. This is false - there's >100GB free on my drive. Also, when I try to copy files into iTunes, I sometimes get "copy failed, the disk couldn't be read from or written to" errors, and corresponding I/O error entries in my logs. Additionally, when I created my day-to-day user account, I was befuddled by my inability to delete my own files. Further investigation revealed ACLs on everything in my user folder denying everyone delete permission. This I was able to fix with some Terminal commands. The copy failed errors persist, though. I've run TechTool Deluxe on my disks, and run DiskWarrior as well. TechTool Deluxe found no errors, and DiskWarrior identified some minor issues related to text encoding. These steps have failed to resolve or determine a definitive cause for the issue I'm having, though. Anyone know what's going on? I'm going to be taking the Mac in to the Apple Store on Saturday or Sunday, if I can't get this solved. The Mac is under warranty (I've only had it for 4 days).