I have been checking the size of my iTunes folder, and I noticed there are 534 temp files, starting with temp file.tmp through to temp file 534.tmp, taking up 13.4 gigabytes of space. Can they be safely deleted?
I would say yes, but to be safe I'd move them all to a folder on your desktop first. If iTunes works properly for a bit after that you can delete the folder.
I would restart, or at least log out, first. Have you tried that?
Okay I have moved them to a folder on my desktop. It seems funny that Clean My Mac 3 has never alerted me to their existence, even though I run CMM 3 at least twice a week.