If you've been having problems posting, here's how I get around it.
When I click save, I get the internal server error. The post gets saved , but it doesnt publish. The way around this is to rebuild. Yes it takes a long time, espeecially if you have a large blog with losts of posts, put then all of your "error" posts show up properly.
The problem was actually caused by a cpanel build that caused this to happen to all MT users. It was causing a 500 server error and the problem with cpanel has been fixed. If you still have the problem, let RC know about it.
Interesting. I got the error on the first post I put up this AM, but not the second. I'll drop him an email. Thanks, Jeff!