scroll-up broken in XEmacs-21.2.40 compiled on AIX v4.3.2

This bug report will be sent to the XEmacs Development Team, not to your local site managers!! Please write in English, because the XEmacs maintainers do not have translators to read other languages for them. In XEmacs 21.2 (beta40) "Persephone" [Lucid] (rs6000-ibm-aix4.3.2.0) of Thu Jan 11 2001 on sp05.cccma.bc.ec.gc.ca configured using `configure --cflags=-g --with-gcc=no --with-cde=no --with-tooltalk=no --with-dragndrop=no --mail-locking=file --with-xpm --site-includes=/usr/local/include --site-libraries=/usr/local/lib --with-menubars=lucid --with-dialogs=athena --with-athena=xaw --with-widgets=no --error-checking=none --debug=no' Please describe exactly what actions triggered the bug and the precise symptoms of the bug: With xemacs v21.2.40 configured and compiled as above, scroll-up does not work. I first noticed the problem in view-mode (where scroll-up is bound to "space"), but the problem happens in non-view-mode windows (where scroll-up is bound to ^V). XEmacs is quite difficult to use without scroll-up, so I don't know if there are any other problems. This problem can be demonstrated in "xemacs -vanilla". Recent keystrokes: not-applicable. Recent messages (most recent first): Parsing /home/mberkley/.mailrc... Loading mail-abbrevs...done Loading mail-abbrevs... Loading emacsbug...done Loading emacsbug...