I have the same problem.. after receiving a file it just hangs at 'Transfer Complete'
I have tried everything written in this forum etc.. I tried it with no firewalls running and it still happends. I am also not behind a router. This did not happen to me in previous betas or final versions but it has on 2.0 Build 906 ..the only that works is the NOOP command. It still NOOPS after 'Transfer Complete' about 10 times then it finally disconnects and comes back online starting back in the queue. Which is still a time waster.
I'm almost positive its an issue in 906 as it didnt do this in previous versions until I upgraded now.