I have a default automatic login account, User A. The Dock renders all it is responsible for (Dock, Launchpad, Mission Control) correctly for User A, but when I Fast User Switch to User B or C or the Guest Account, the Dock process doesn’t render anything properly, as shown in the screenshot. This doesn’t happen when I disable automatic login and login to either User B, C or Guest on boot.
I did not have this problem on Lion.
If it matters, I have an Sapphire ATI Radeon 5450 HD.
Why is this happening and how do I fix it?