Frozen Menu when 'Right Click' on any 'entry in any sub-menu', Starting from Lubuntu 11.10 to Lubuntu 12.10, simply, it is still happening.
Usually, if you, for example:
Menu > System Tools > Task Manager
Once you click on "Task Manager", the application will start and the menu will disappear. Prefect so far.
Menu > System Tools > Task Manager > Right Click on Task Manager
Will produce the bug I posted above. The menu will NOT disappear UNLESS you go back and click on the menu icon. Clicking on the Desktop is USELESS.
Before, I thought "Add to Desktop" is the reason but I just found out that the trigger is actually the right click on any entry on any sub-menu.
HOW to fix that?
It's been a year (11.10 - 12.10) and that annoying issue has no available fix as of now.
Note that, I have ran:
sudo apt-get update
sudo apt-get upgrade
So, the system is up-to-date.
sudo apt-get dist-upgrade