Export merge on Household breaks if relationship name changed

If you do a search for contacts and then export the result there is the option to merge the contacts into the household. If you use this option and have changed the label of the built in relationships: Head of Household Is or Member of Household Is then you will be presented with a DB error as the relationship results in an empty string column trying to be created in the temp table.

The solution is to change the identifying column from "Label" to "Name" as Name is constant.

Please see this thread for the exact patch
http://forum.civicrm.org/index.php/topic,28068.0.html