AFP file shares missing sub folders until re-connect?

Wondering if anyone else has seen this behavior, I found similar stuff about SMB but not AFP. Users are connectiong to an OS X 10.6.8 server file share (clients are 10.6.8 and 10.7.X), and some sub folders appear missing, the user must reconnect and they will then show up. All the people complaing have shortcuts to the shares set up in the side bar, some poeple say they didn't use the shortcut to connect. Could be a red hearring, but seems to have some connection. All the files are really still there and reconnecting to the server fixes, aside form inconvienince, people freak out thinking someone delted everything. Nothing in the server logs seems to indicate a problem...