> Why should it matter what the session number is, 0 or 5 (or whatever
> it is)?

I don't think it should and i have not seen the same problem you have in
my use of Sun Rays whilst telnet'd to another machine and running a
piece of X software.

Clutching at straws, are you running a pacthed Sun Ray server? I am
running version 2 patched without problems.

Sorry can't be more help
Ade