When an app freezes on my app, I will press Command ⌘+Option ⌥+Esc ⎋ to open the Force Quit window.
However, this will often take minutes, and clicking on the Force Quit button freezes the Force Quit window and makes the beach ball appear. The window confirming the force quit only shows once the application unfreezes.
Also, if I right-click the Dock icon while the app is frozen, then the Dock will freeze, but it doesn't freeze when I just pass over the icon.
It is also possible to move the application's windows.
So how is it possible for some tasks not to be frozen, while the most important task (the Force Quit window) freezes at any interaction? And what do you do when the Force Quit window itself freezes?
ps? I have an issue similar to Jonathan's, but the Force Quit window appears to be perma-stuck open (I can ssh into my machine)