I love your Editor Tabs plugin Ross, this UI enhancement should it should totally be included in the WordPress core.
But I have encountered a small issue with it. When I try to create or edit a form with the Gravity Forms plugin, the "AJAX" panels don't show up or are stuck.
I have noticed this same problem with the new menu editor in the beta of WordPress 3.0, the page links are supposed to be draggable, but are stuck.
By best guess is that you are loading a different version of JQuery or another library that these other features need too, and there is a conflict?
One other little bug I noticed with another of your plugins that I love, CMS Dashboard, is that the links have changed in 3.0 and will have to be updated.
Keep up the great work Ross!