Quote Originally Posted by 'keyclone',index.php?page=Thread&postID=174364#pos t174364
my guess is that you closed multiple wows at once. this was a problem a few months back, but Blizzard seemed to fix it.

basically, my guess is that 2 wows open the same general settings file and try to right to it. one can, the other cannot. this they collide.

try exiting in a more staggered fashion and see if the error goes away
intresting! noted in my brain bank for future reference