I have just upgraded to WordPress 3.0.3 and I got a nasty error in my admin dashboard.
When I click publish post, I see the post in the front-end, but in the admin i get this page http://www.domain.com/wp-admin/post.php blank. when I check the queries for post.php I see response "500" "20".
I have disabled W3TC and re-tried publishing. All is working well. A fix would be much appreciated. I really like&need the W3TC plugin.