yea i am having similar issues. now my machine dosnt stop responding, just tibedit. if i let it sit for a little bit it will finish its task and start to respond again but it can take like 5 min. no big deal to me it is still in beta. other than this issue i cant find anything wrong that isnt alredy posted.
but yea it could be a system problem with it locking up.
im running 2 gig ram and a amd 4200+ x2 with vista ultimate.