SmartyPants breaks TrackBacks

I've been using SmartyPants to HTML-prettify my typography. Unfortunately, I just realized that it breaks TrackBacks. In the last post, I had a curly-apostrophe in the first word: "I'm". All the trackbacks I sent out stopped their excerpt right after "I". Not very interesting reading, eh? See the problem in action here. I guess I'm going to have stop using SmartyPants. It's a shame -- it was a cool feature.