I believe I've tracked this down. It seems to be a problem with xemacs
-unmapped. The following behavior is repeatable in 21.2.45 on 2 RedHat
7.0 systems without a .emacs or .gnus:
1. xemacs -unmapped -f gnuserv-start &
2. gnuclient
3. M-x gnus
4. quit gnus
5. gnuclient -nw
6. M-x gnus in the tty gnuclient.
7. Enter any group.
8. SPC in the *Summary* buffer (`gnus-summary-next-page') does not
scroll the *Article* buffer.
If one kills the X gnuclient (delete-frame), SPC starts to work again.
Start another X gnuclient and SPC will stop working.
This problem does not exist in XEmacs 21.1.12. Without the -unmapped
option, again there is no problem.
--
Nevin