There is a condition when upating the root node that return nulls for the getValueAt from the TreeTableModel.  This was causing the nodes to not display correctly.  I added a check for this case and all seems to be well.  Seems somewhat hacky, but it works.  Need to add VisualCheck and update.
There is a condition when upating the root node that return nulls for the getValueAt from the TreeTableModel.  This was causing the nodes to not display correctly.  I added a check for this case and all seems to be well.  Seems somewhat hacky, but it works.  Need to add VisualCheck and update.

certusoft/swingx,certusoft/swingx