[Resolved] 3.0.4 upgrade causes wp-admin error
After upgrading to WordPress 3.0.4, I first saw some odd symptoms in wp-admin (posts not appearing in the post listing). Now, after logging in again, any time I try to access wp-admin, I get a 500 error from the server.
Most directly related to the wp-admin issue, I’m getting a “Call to undefined function add_submenu_page()” each time I load wp-admin.
What I’ve tried:
1. Reinstalling the update manually. (I used auto-update first, which reported a successful upgrade.)
2. Disabling all plug-ins / mu-plugins manually. I still see the undefined function error in PHP, only for wp-admin/menu.php
Anyone know what might trigger this error?
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