Aeros? On W7, I spend all my time repairing them, Vista, never seen them.
Tried full range of zoom and some strange Adobe Gamma that seems to be in control of the monitor. No other useful thing in Control panel.
The grey strip is sitting atop the blue background menus. Just checked the Rivetess' FF 3 point something, and the menu strip is part of the blue, with just the - smallerize and X on its own line - just as it's always been. Mine is pushing everything down one line and has its own short strip of grey. It definitely only occurred with V 5 installing itself.
Oh, FF'S sake! Now that menu is in a little orange box marked Firefox. To get the items, one has to make it pop down the list. Bookmarks is now on the bookmark toolbar.
I have no idea what's going on. Time for a reset perhaps.