Some pages render blank?

I have a weird issue where a large number of my posts in a certain category will not load. They work when listing posts, but when trying to access them directly the page is just blank — seems like it’s failing in the middle of the loading process.

I keep feeling like I have it narrowed down, but then I can’t make a connection.

Here’s the category page:
http://abovegroundmagazine.com/category/the-leak/daily-dose/

This one loads:
http://abovegroundmagazine.com/the-leak/06/04/toki-wright-by-the-time-i-get-to-arizona-2010-2/

This one doesn’t:
http://abovegroundmagazine.com/the-leak/daily-dose/06/08/mood-peddlers-of-doom/

I thought maybe it was my youtube embed plug in, but it seems to work fine on all of the other videos in the regular “Vids” category where we use the same plug in:

http://abovegroundmagazine.com/the-leak/vids/06/09/rhymefest-say-wassup-ft-phonte/

I’m just lost here. No idea why this is.