No, it's not bad. Do you have SSH access?

If so, stop MySQL server and run:

myisamchk --silent --force --fast --update-state -O key_buffer=64M -O sort_buffer=64M -O read_buffer=1M -O write_buffer=1M /var/lib/mysql/databasename/ubbt_USERS.MYI

Rob

My place to be: http://www.freesat.nl