screen refusing to reattach

[Eric Smith]

Ok, this has caused me enough inconvenience so I will 
finally ask about it.  Every now and then screen freezes
and if I try to reattach the seassion elsewhere, the
command `screen -x' just hangs.

Sometimes killing off the child processes seems to work,
other times not.  Usually after many hours the screen
of its own accord becomes re-attachable.

Avoidable?

-- 
Eric