The bugzilla-redhat-mysql-LATEST.tar.gz dated Thu Jan 13 17:28:00 2000 doesn't have scripts to create all of the needed mysql tables. It's sort of obvious by going through the perl when it starts barfing, but not entirely. Missing table is user_group. Tables which needed altering were groups and products. Or at least, those are the ones I remember changing.
Package is also missing the processmail script, the bug_group table, and the bug_when column from bugs_activity
Thank you for bringing this to my attention. It should now be fixed.