Hathor hide all modules in icon position when more then 1 module is assigned in control panel

How to reproduce the problem and/or test the patch::
add more then one module in "icon" position in hathor template

Joomla tracker :
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_id=8103&tracker_item_id=32792