Error when trying to access Appearance--->Menus WordPress

Maor Barazany answers:

Hi,

1. Try to deactivate all plugins and see if the problem disappeared.
2. If not, try to switch to default 2010 WP theme.
3. If not, check with your host that the register_globals is set to off.

Michael Fields answers:

Hi Patrick,

This usually happens when you have added a term of a custom taxonomy as a menu item and then removed the code that registers the custom taxonomy. Have you deleted any plugins lately? Perhaps you had a theme installed that registered a custom taxonomy and you recently switched themes. In any case, what you need to do here is to re-register the custom taxonomy so that you can remove it from the menu system. This error should go away once this is completed.

I have reported this error to the testers list. Not sure if there will be a patch for it.

http://lists.automattic.com/pipermail/wp-testers/2011-April/014167.html

Best,
-Mike

Denzel Chia answers:

Hi Patrick,

This could happen if you remove a custom post type or custom taxonomy, without removing the menu item that is using it.

This could also happen if a menu item of custom post or custom taxonomy is not removed and you switched to a new theme.

Thanks.
Denzel

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