Have noticed a strange bug since upgrading to WP 3.04 -- the WP nav menu system has stopped working. I've narrowed it down to a conflict with Custom Post Type UI.
When I navigate to Dashboard > Appearance > Menus, none of my menus show up on the page. Additionally, the following error appears in the meta box for the taxonomy within the Menu section:
Catchable fatal error: Object of class WP_Error could not be converted to string in /home/mariat/plainparade.org/clawp/wp-includes/formatting.php on line 433
Any suggestions for fixing this?