Running Ensemble8 on yesterday's nightly 8u20 build shows a problem with drop down menus on their first showing. Steps to repeat:

1. Run Ensemble8
2. Visit Controls/ChoiceBox
3. Click on the ChoiceBox to display the list of alternate selections.
Expected: A vertical list of selections
Actual: A small rectangle of garbage
4. Unclick and click again and the selections show just fine.

Other steps to repeat:

1. Run Ensemble8
2. Visit Controls/Menu
3. On Mac, the menu appears in the system menu bar, so deselect MenuBar Options/Use System Menu Bar
4. Now that the menus appear in the window itself, try to open the menu items.
Expected: A drop down list of menu items
Actual: Small rectangles of garbage
5. Unselect the top level menu item, or move the mouse back and forth over the menus a couple of times and then the menus will display correctly.