Run the Combobox demo in swingset2.

The frame at right is initially empty. It used to show the three preset
face components.

Now add either the nose or mouth component (one of the lower two: not the
topmost component). It will appear at the top - not in its correct location.

This behavior is new in build 34 of Merlin-beta. The main putbacks into
build 34 were 2D and Swing. Swing seems the more likely candidate, especially
given the following comment from the putback:

> Drastically simplified JComboBox - short circuted roundabout selected item
> updating mechanism.