Posts don’t always delete

I have trouble deleting posts sometimes. When I delete a post, I get the message saying that the post is deleted. But if I navigate away from the screen and then go back to manage posts – it is still there. I’ll have to log out and log back in before I can actually delete it.

I’ve had trouble creating categories as well. Same thing, logging out and logging back usually fixes it.

None of the other blog users are having this problem.

I feel like it is a cache issue – I use Windows and always the latest public build of Firefox. I have Firebug (currently disabled), web developer toolbar, and a bunch of other minor extensions installed.

Are any other users having this problem?