Comment 14 for bug 971018

Just wanted to add that I too have this bug however I have one thing extra that is not apparent in the video above. When I click the option in settings to enable Autohide the bar disappears but leaves a background behind.
I have added a screenshot of this. As you can see when I drag a window into the area where the bar appears it is sent behind where the hidden launcher is usually displayed.

Ubuntu 12.10 fully patched. Also was happening before installing any updates.
Virtual Box: 4.2.6
Windows 7 x64