When clicking on the JTree demo uner GTK Look&Feel, the tree cannot be expanded at the first time. Only if the user switch to Motif Look&Feel or Java Look&Feel and click on the Tree, it can be expanded. Then comes back to GTK Look&Feel again, click on the expanded tree, it will have response to the clicking.

STEP TO REPRODUCE:
1. Launch the SwingSet2 demo under J2SDK1.5.0/demo/jfc/SwingSet2/ dir
2. Go to "Look&Feel" -> "GTK Look&Feel"
3. Go to JTree demo and click on any of the tree nodes. No response at the first time.
4. Go to "Look&Feel" -> "Motif Look&Feel" or "Java Look&Feel"
5. Go to JTree demo again and click on any of the tree nodes. It can be expanded.
6. Go back to "Look&Feel" -> "GTK Look&Feel"
7. Go back to the expanded JTree demo again, click on any of the tree nodes. The JTree can be expanded under GTK Look&Feel.

This happens in JDK1.5.0 b15, but is not a regression bug.

###@###.### 2003-08-22