On my new Mac Pro with 1.5.2 OSX whenever I do a disk permissions repair with disk utility it takes several minutes (quite longer than my MBP) and then it reports a series of messages saying ACL found but not expected in library ACL found but not expected in applications ACL found but not expected in applications/utilities It reports that the disk permissions have been repaired but the next time I run it it repeats the messages and keeps taking a longer time than I expect. I am new to Macs, and my only other experience is with the MBP which runs 1.4.11 OSX. It does disk permissions repairs much quicker and has never reported anything similar, and after it does any disk permissions repairs, I don't see them mentioned the next time I run the utility. Can anyone please advise on what may be the problem? What is this ACL it keeps referring to? Is this a Leopard bug or a setup problem on my new Mac Pro or something else? What might be the solution? Thanks a lot for any advice.