Thanks Jimmy, that stopgap edit worked for me.
Great plugin by the way, I appreciate your hard work.
Basics here http://codex.wordpress.org/WordPress_Housekeeping
Being database-driven software, the performance of your WordPress blog will be impacted by what’s in the database.
Here’s a useful article about cleanup and maintenance
http://www.maketecheasier.com/8-useful-tricks-to-clean-up-streamline-your-wordpress-database/2009/02/17