I have network between iMac (core 2 duo 10.4.7) and PC (windows XP SP2). Everything works good. I can connect from Mac to PC and from PC to Mac. But if i connect from Mac to PC, and then open open shared folder, that contains more than 50 files or another folders (approximately) finder hangs for some minutes, then opens this folder but shows that it's empty. If i connect from PC to Mac *all works fine.