It looks like the parser on usernames misses the " ' " key if it is found in a username.  I noticed this when searching for threads created by "mario's left nut" as I wanted to find his NES Display Case thread. No results were found because it searched for threads started by "marios left nut" not "mario's left nut".  I manually corrected the name and the search worked properly.  Just a really minor bug and figured I'd make a note of it.