This is somewhat speculative because I don't have any real evidence. I live in a world of xterms - where they are invoked like xterm -name ${sys} -vb -sb -sl 5000 -e ssh -Y ${port} ${remote}& I've noticed recently (and perhaps before) that if a connection to one remote machine hangs - often because the network down the line is snipped in some way and is reconfiguring.. then all the X processes hang. I don't think the X11 server is hanging - because I don't get the Not responding message in the Force Quit dialog. It's probably hard to simulate this - I suspect that the TCP connection is perhaps maintained by the Linux code in my local broadband router. Just wondered if my diagnosis makes sense and is likely. If so, I'll try and get some dumps next time it happens. Thanks for beta3!!!