FeedSmith Plugin and WordPress 2.3.1

I recently installed the FeedSmith plugin for WordPress 2.3.1 a few days ago on my blog at http://blog.charleshudson.net. Since the upgrade, I haven’t been able to get my Feedburner feed to update. I’ve tried to ping my feed and done several resync operations and still no luck.

Any thoughts about what the issue might be? Any known conflicts between FeedSmith and WP 2.3.1?

I’m also using the RockinPaper theme, if that helps.