Contact Merge Issue - all data copied

Please see the attached sequence reproduced on the demo server:

1) Original contact on the demo server
2) Create duplicate contact with phone, email and postal details
3) Select to merge, omitting (no check box) and selecting (check box) data to transfer to original contact
4) Merge results

It looks like all data is transferred regardless of checking the box to transfer. Link to forum thread: http://forum.civicrm.org/index.php/topic,34820.msg147963.html#msg147963