Warning message setShowFilterEditor listGrid

[dencel]

When setting setShowFilterEditor(true) and setShowRowNumbers(true) on a listgrid. I receive a warning:filterEditor:Fields array contains an empty entry.
When I set setShowRowNumbers(false) this warning disappears.
I think this warning should be ignored.

[fatzopilot]

I get the same warning for some time now.
Might be related to
http://code.google.com/p/smartgwt/issues/detail?id=608 and
http://code.google.com/p/smartgwt/issues/detail?id=611

For one of my grids, the list grid headers are not shown at all
They reapper if ListGrid.setShowGridSummary(true) is set to false or not set at all. If it is disabled on each column individually but set true for the whole grid, the error is still there.
No clue what the problem might be, though, as it worked OK until recently.