Combo Box issues with Eclipse Luna

Combo box drop-downs show incomplete and overlapping lists.

The attached JDBC importer's Connection Profile drop-down should show 20 items, but show multiple item text in same item spots.

WidgetUtil.setComboItems() seems to be adding the proper String items to the combo widget.

I did check other UI components, in luna and most seem to use Combo.setItems() rather than add them 1 at a time.