Call to undefined function category_cache_op in the taxonomy module - Fatal error appears after running update.php

Fatal error: Call to undefined function category_cache_op() in ...\category\wrappers\taxonomy\taxonomy.module on line 757

This usually happens after I run update.php.

It looks like this is discussed in http://drupal.org/node/735156 - I have the category resave module enabled all the time... if that is any help.

Should that be unactivated and then re-activated again? Or turned off now? Could use some assistance.