Decided to do a verify disk, and it came up with the following message... Invalid directory item count (1272 not 1274) Invalid directory item count (39 not 37) Volume bitmap needs minor repairs for orphaned blocks Invalid volume free block count (17933196 not 15545569) The volume Macintosh HD was found corrupt and needs to be repaired The disk needs to be repaired using Recovery HD... I was just today, going to do a full time machine (time capsule) backup, because i rearranged a load of my files (not system ones). This will take a while. But i think i should backup before repairing the disk?? THe disk appears to be working fine, and i don't think i've done anything to upset it. It's under 1 year old (my last one died), and is from Apple. What do all these numbers mean? Is this a bad corrupt, or a simple something is out of place corrupt?