When I tried to run the search index rebuild I got this result:
Disabling the forum for the duration of maintenance run
PLEASE WAIT WHILE INDEX IS BEING REBUILT, THIS MAY TAKE A WHILE
Warning: fopen("/var/www/html/forum2_data/messages/msg_","rb") - No such file or directory in /var/www/html/forum2_data/include/fileio.inc on line 24
Warning: Supplied argument is not a valid File-Handle resource in /var/www/html/forum2_data/include/fileio.inc on line 45
Warning: Supplied argument is not a valid File-Handle resource in /var/www/html/forum2_data/include/fileio.inc on line 46
Warning: Supplied argument is not a valid File-Handle resource in /var/www/html/forum2_data/include/fileio.inc on line 37
Re-enabling the forum.
The install was done a couple of minutes earlier, straight from the latest CVS code.