The bug report was for 11.10, but I can confirm that this is still present in 12.04. In a laptop set to suspend after lid closing, it's easy to reproduce by invoking the workspace switcher and closing the lid. Normally, after reopening it, you'd be presented with a password prompt, but if the last thing shown was the workspace switcher, then you'd see that instead of the password prompt.
Hi,
The bug report was for 11.10, but I can confirm that this is still present in 12.04. In a laptop set to suspend after lid closing, it's easy to reproduce by invoking the workspace switcher and closing the lid. Normally, after reopening it, you'd be presented with a password prompt, but if the last thing shown was the workspace switcher, then you'd see that instead of the password prompt.