Luckily I haven't met him yet, and starting with my new character should delay the inevitable for a while
One more thing, although not sure whether this classes as a bug:
My first character in Undermountain apparently has reached maximum level at around 26... This is what it says in the summary screen when you select the character you want to play with. (where it says current xp = , next level = i get maximum level instead of an XP score). I haven't had a chance to play long enough with him to reach a level-up point, but any ideas?