ListGrid in expansionComponent has floating white box

[micsky]

SmartGWT 2.4
FF 3 (only browser tested on)

I have a ListGrid (B) in an ExpansionRecord of another ListGrid (A).
ListGrid(B) has a floating white box which appears top left. No idea how to get rid of this. Box appears with or without the header displayed (B).

See screencapture: image.png

[smartgwt.dev]

Have you tried inspecting that element using Firebug? If not, please do so.

[micsky]

Shows up with class="groupLabel" (no further identifying information)
Could not figure out how to turned off "Group Label" on ListGrid. Ideas?

[micsky]

Finally figured out what was configured incorrectly.

Had ListGrid.setIsGroup(true) where I didn't have ListGrid.setGroupTitle("") set therefore white box appeared.

Simple disabled IsGroup() ...note: does not effect grouping.