Oh, no reason to be sorry! (In fact, if you want to know the truth... I surprised myself! I'm 99.9% sure I at one time saw an interview with Matt Groening where he said it's spelled, and supposed to be pronounced, in exactly the same way as "crabapple," thus the joke.) As usual, my sources were
www.imdb.com and
www.thesimpsons.com, both of which are great references for spelling for both the characters and the voice actors/actresses.
I'm just amazed no one ever got the joke!
R
------------------
31 December 2000... The Holy Door opens
http://www.geocities.com/xterminalx/holydoor.html