bill - 7:12 am on Mar 15, 2010 (gmt 0)
That really messed me up as well.
Focus on the browser window (click somewhere inside the browser.) Then click the Alt key. That will bring up a menu where you can toggle the Show Menu Bar.
People using the default menus will have a large half "O" button in their Tab bar. Clicking that will bring up the same menu where you can toggle the menu.