Upgraded WPMU and some blogs posts not showing - random chaos here!

Just upgraded to WordPress MU - and all of a sudden some of my blogs are not showing their posts...even though the accurate post count shows on the dashboard - the post titles show in sidebar recent posts widgets etc. It's not every blog - just random ones throughout the site.

I use this for our school district and desperately need help!

URL of our site - http://blogs.burlesonisd.net/
URL of a blog with no posts - http://blogs.burlesonisd.net/kingsblog/

Please help!