Cleaning up after this mess, I saw a lost+found folder was created, and an iNode was in there (iNode290815 to be precise). Read what this meant online, and ran disk repair. It seemed to fix whatever problems may have been left over from the install, but the iNode file is still there, and it's 3.6 gigs large. Since Disk Repair checked out, and everything has been running well, is this file ok to delete? I'd like the space back, if possible, or at least move it so its out of sight.