Versions:
GXT: v2.2.4
GWT: v2.3.0
Browser: FF 4.0.1
OS: Mac OS X 10.6.7

Problem:
Any context enabled component (grid, tree) doesn't hide the context menu if no selection was made.

Steps to reproduce:
1. Right click on a context menu enabled component
2. Don't select any menu in the context menu
3. Clicking anywhere in anywhere other than the context menu won't close/hide it

Screen capture showing the problem: http://www.youtube.com/watch?v=Yy-lawekrpU