Three hours on this error so far, and it's frustrating the hell out of me. I don't want to give up now - that means IT WINS, and I'm too stubborn for that.
ETA: Joy! Because I am brilliant, I totally solved the problem using htmlentities and it worked smashingly! Then I accidentally deleted the entire database trying to clean up my test posts! GENIUS!
Coding = 18, Ellen = 1
ETAA: Restored from backup, only lost a few comments due to stupidity. Going to go drink booze now...