Beta 21 fixes the issue. http://forums.camerabits.com/index.php?topic=13499.0
-Kirk
Sorry I missed your previous question... didn't get a notification for some reason.
I tried Beta 21 and got some perplexing results. I created a test folder and copied a few photos into it. After selecting "Move To Trash" the images disappear from the contact sheet, but the folder remained. I used the Finder to look inside the folder and the images were in fact gone, but the folder contained a file named ".afpDeleted209720". I tried to delete that file manually and got an error "The operation can’t be completed because one or more required items can’t be found.(Error code -43)" but oddly the file deleted anyway. Trying to delete the test folder manually resulted in the error "The operation can’t be completed because the item “TEST” is in use.". I quit PM, disconnected from the server, then reconnected, and that allowed the folder to be deleted via the Finder.
I then tried to repeat the above test multiple times and it worked perfectly every time. Weird. It just fixed itself... maybe from the reboot of PM, or maybe due to disconnecting and reconnecting the server. Dunno, but all seems well now. I'll post back if it happens again.