run attached app, open task manager to watch the GDI objects of that app, the number of GDI object keeps increasing constantly. If that app is run for a long time ( one hour or so), you will see the UI of that app is corrupted. That is, the GDI heap is exhausted.

Also in task manager, I found two java processes for a single app. What's that ?

java version "1.6.0-rc"
Java(TM) 2 Runtime Environment, Standard Edition <build 1.6.0-rc-b69)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b69, mixed mode, sharing)