Open some top-level container (New Form Template | ...)
Try to get context menu of this container.
* for Frame, JFrame, JInternalFrame, Applet and JApplet you will get attached exception
* for Dialog, JDialog you will get context menu but not under your mouse pointer
*** Bug 6873 has been marked as a duplicate of this bug. ***
*** Bug 6927 has been marked as a duplicate of this bug. ***
Resolved for 3.3.x or earlier, no new info since then -> closing.