[OPEN-1297] multiple DragZones with ddGroups not working

Ext version tested:

• Ext 3.2.1

Adapter used:

• jquery

css used:

• only default ext-all.css

Browser versions tested against:

• FF3.5 (firebug 1.5.4 installed)

Operating System:

• Linux

Description:

• When I use ddGroups in 2 DragZones and build 2 DropTargets I can only
  successfully drop on one Target, in my case its the Target with the same ddGroup
  from the first instanciated DropZone

Test Case: See this URL :
http://www.sencha.com/forum/showthre...iple-DragZones

Steps to reproduce the problem:

• Drag one element from the top to the bottom field, an alert should occour
• Drag another element from the bottom to the top Field, no alert occurs

The result that was expected:

• an alert should occur in both cases

Debugging already done:

• none