This .ARK explains how to fix a BUG in HBBS/PBBS that allowed new
   users to _overlay_ ACTIVE users, and allowed new users whose last
   name began with "A" to put the system in an "endless loop".  First
   in a series of FIXES and HACKS from Dick Roberts of The Holly Park
   RCP/M (201) 757-1491 [Still PCP]