> If something on your host (such as a startup script) modifies the DISPLAY
> environment variable, then the programs wouldn't know to forward
> connections through ssh; they might even be trying to display themselves
> on your own computer's screen!
Yes; I had exactly that problem at first. Once I realized that ssh
should have been handling this automatically and wasn't, I scrutinized my
.cshrc and .login (and the file they sourced) - written by my CS201 TA
fall of my freshman year, which I copied as instructed not knowing
anything about UNIX at the time - and found the culprit setenv.
Matt