My Unity Launcher is currently stuck open. Short of logging out and back in, does anyone have ideas for getting it to auto-hide as usual?
It turns out that the Launcher is supposed to stay open on workspaces containing no windows. Two of my workspaces had maximised windows which Unity didn't seem to be noticing, and when I closed those and then re-opened them, the Launcher reverted to its correct auto-hide behaviour.
Perhaps one could also simply move the window to another workspace and back to get the Launcher unstuck--I did not think to try that.
If you wish to have the launcher always autohide, you can use the Unity plugin in the CompizConfig Settings Manager. See this question for complete instructions.
timmay143's workaround helped me. The bug seems to be fixed now: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/769703. Fix not released for Natty yet.
None of the suggested solutions work for me (16.10) - not even going into autosettings and disabling then enabling autohide.
The ubuntu "start button" is highlighted like it has focus.
I could restart unity - but it's a pain when you have many docs open.
This is so annoying and I must admit that even though I like unity - the launcher is subpar - even if it wasn't buggy.