Upgrading from SmartGWT 4.1p to 5.0p Drag & Drop problem

Hi,

When a ListGrid is grouped on a field, Drag and Drop does not work.

Example on #effects_dd_tiles_move
when the column "Endangered status" is Group by, Drag does not work

Thanks

http://www.smartclient.com/builds/SmartGWT/5.0p/LGPL/2014-09-19/smartgwt-5.0p.zip
Chrome/37.0.2062.120m