will it work with wp 3.4.2?

I’ve been hesitant to move to 3.5.

I did install it but on the admin screen I get this:

Warning: call_user_func() expects parameter 1 to be a valid callback, function ” not found or invalid function name in /wp-admin/includes/template.php on line 1119

Will it work? I’ll disable it until I hear back.
Thanks!

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