RSS2 feed stops loading after ~200 KB

My feed, located at
http://www.anime-pulse.com/feed/
just started truncating after about 200KB of data. It used to work fine, and show all 4 years of posts. Just in the last couple of days have I noticed this, although it could have happened on the upgrade to 2.8.4. If you look at the source it just stops at a certain point, and it’s not tied to a certain post either. If you look at a category feed, like
http://www.anime-pulse.com/category/podcast/feed/
then it truncates at a different point, although about the same size.

I haven’t changed anything with my configuration except upgrading to 2.8.4.

I have tried disabling all plugins, and that gave me about another year of posts, mainly because disabling podpress removes all the enclosure and iTunes data from the feed, but it still truncated.

I have also tried changing my memory limit in the php.ini file to 64M from 32M, as well as adding the “define (‘WP_MEMORY_LIMIT’,’64M’);” line to the wp-config.php file. No change at all.

Any ideas? Having my feed broken means my podcast is broken.