After upgrading to Version 3.0 I can't edit a post from the link at the bottom of the page called "Edit This Entry". Every time I do "nothing found for Wp-admin Page Php?action=edit&post=1141" (1141=page ID). This happens on every post. It's the same for every page but obviously the page id at the end is different.
I have no idea where to start looking on how to fix this issue but I can edit any page you tell me to do. Please help.