We are receiving reports of problems with BitPerfect 1.0.4's Permissions Scan process with iTunes 11. As you may already know, BitPerfect 1.0.4 was submitted to the App store for approval long before iTunes 11 was released, and it has not therefore been pre-tested with iTunes 11. Unfortunately, we are quite unable to reproduce any of these problems on any of our own systems. We are therefore in the process of collating as much data and customer feedback as we can, and hopefully we will be able to identify the root cause as soon as possible.
Once we know what the cause is, we can determine the best course of action. Stay tuned.
UPDATE: Some (but not all) users are reporting that the problem can be resolved by quitting BitPerfect, and launching iTunes manually. Then, once iTunes has had a chance to get itself fully up to speed, stating BitPerfect again and running the Permissions Scan manually (click on "Change Music Directory" in BitPerfect's status bar menu).
UPDATE: Thanks to BitPerfect user Bill Riel for pointing this out: "Like many others I had quite a bit of difficulty getting BitPerfect 1.0.4 to scan my library when using iTunes 11. It seemed that no matter what I did, at best BitPerfect would start the scan, then immediately shut down before finishing. I just tried something a bit different: I had iTunes already open **and playing some music**. I then launched BitPerfect while iTunes was playing, and this time, the scan was successful. I then quit iTunes from the BitPerfect menu, re-launched it and things appear to be functioning as they should." We have a lot of very helpful users out there.
UPDATE: With BitPerfect 1.0.5 we now have an additional option to execute the Permissions Scan manually. Please read the revised User Manual for more details.