6u10-b09: Nimbus on NetBeans
I can spot the following problems:
1) output tab window is black.
2) toolbar "headers" seem to be rendered horizontally rather than vertically.
3) library and module icons in the tree view are rendered as "sub-icons" rather than their normal sizes.
In addition, I'd expect the nice gradient-looking fill like the first demo in SwingSet2 for the IDE background rather than a plain pale blue fill, but then I can't consider that as a bug.