I don't know if this is known but I'll just post it anyway.
Let's say I edit the time stamp of Post A to be posted in a few days from now.
Then I type Post B and want it to be published now.
What I saw appearing on the site would just be the permalink of Post B and nothing in the post. In fact, nothing appears below that permalink anymore.
But all goes well if you post after Post A has been published.
The only possible related plugin I'm running that I *think* may have caused is Custom Query String. http://mattread.com/projects/wp-plugins/custom-query-string-plugin/
I'm sorry I didn't test this out further, (ie. disabling the plugin etc.) I'm really busy nowadays.
EDIT: I'm on WP 2.0.5