up2date complains about a bad header in the xorg-x11 package.
using the ibiblio ftp mirror but it happens on others, too. asked for just xorg-x11 Message window popped up:
"There was an RPM error. The message was: Error reading header."
The console for up2date echoed:
/usr/share/rhn/up2date_client/checklist.py:139: DeprecationWarning: integer argument expected, got float
info = self.get_selection_info (event.x, event.y)