3.0.0dp6 Crashing on Stop Editing Group

[Sivakatirswami]

I had a repeatable crash today in 3.0.0. dp6

create group... click to edit group and add and object... click on 
existing field  option drag to duplicate  the field. Screen blinks at 
me... no object is not created. try to stop editing group. Rev hands 
spinning ball. I have to force quite (OSX 10.5.2)

I tried it several times... a blocker... I'm back to 2.9...

Can anyone verify?  it happened each time tried anything that would 
cause the editing group to revert browse.

skts