Duplicate contacts in search and profile search listings

Similarly to the recently fixed issue reported on the mailing list where a contact in several groups would be listed twice in a search on both of those groups, searching for contacts by tags also displays the same issue.

Searching for multiple tags will list a contact multiple times if the contact is associated with several tags, and if a smart group is made up of several tag matches then a contact will be listed multiple times within that smart group.

Interestingly with the group fix for the problem mentioned above searching for a smart group and another group causes the contact to be listed once where searching for the smart group by itself causes the contact to be listed multiple times.

I have found that this is a problem in the profile search and the advanced search.