[no subject]

[Henry@MIT-AI]

If you're in Two Window mode in Zwei and you exit from the editor to Lisp, then
Supdup to AI,  when you finally return to your editor, you discover the bottom
window has disappeared [seemingly underneath some others - Bury mouse
operations eventually recover it]. This is one of a number of events that
cause this kind of problem. Certain kinds of errors from evaluations 
done inside the editor result in burying one or more of your editor windows
below the Initial-Lisp-Listener [I'll supply more details if necessary when 
I track them down further].