Binary package hint: gksu
Just a minor niggle. If you do something that requires gksu/gksudo to ask you for your password and have opened a menu from the menu bar in the time it took for the password prompt to come up, the prompt doesn't come up and you get a "could not grab mouse" warning.
Usually you don't have time to open a menu in the time it takes for the password prompt to come up but if pressing the update-manager and then immediately clicking say...system (which is right next to it on my panels) as fast as you can you get this warning. I first noticed this when i was launching update-manager and doing something else at the same time...for one reason or another there was a slow-down and the password prompt took a second or two longer to come up. When it DID come up, as i said i was in the middle of doing something else and happened to have a menu bar menu open and that's how i noticed it.
And the misleading "malicious user" warning is another issue all together.
I think I can't reproduce this on feisty.. you still can ?