We've been experiencing quite a few disconnects recently. The server is on a fast/stable University network, and although I can't possibly completely rule out network problems (one would think that all the participants crashed out at the same time if there was a problem on our end.) - I found these in the logfile:
2008-02-13 15:16:14.596 Message: Type 24 (session 1383, size 4) corrupt or...
2008-02-13 14:37:42 UTC in Mumble