User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:2.0b9) Gecko/20100101 Firefox/4.0b9 Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0b9) Gecko/20100101 Firefox/4.0b9 The title bar is not refreshed when I switch to another Windows app, then I come back to Firefox. It happens only when Firefox is not in full-screen. I think this bug was introcuced in beta 9 of Firefox 4 (as far as I remember, I had no problem with beta 8 and older betas). Reproducible: Always Steps to Reproduce: 1.open firefox (not in full screen) 2.switch to another app 3.switch to firefox Actual Results: Title bar is not refreshed, ie it is displayed with unactive window color, but Firefox window is the current active window. Expected Results: Refresh title bar each time Firefox window is unfocused or focused.

Additional info: the window title bar is refreshed if I manually move mouse over it (without clicking).

I get the same thing, although its all over the place, sometimes doesn't happen sometimes it does. What I also see, is when I leave firefox and click on a different app's window, the firefox window's title bar doesn't lose its focus colour. Then when you click back on firefox the title bar loses focus colour even though you just put it in focus. And sometimes you get half and half - half in focus colour, and the other half of the title bar is not. See attachment for this. I use a persona. Mozilla/5.0 (Windows NT 5.1; rv:2.0b10pre) Gecko/20110118 Firefox/4.0b10pre

Note the black boxes on the app tab and the tab beside that are ones I added to hide work, they are not defects. Note also the inactive/active halves can be reversed, sometimes I get active on top, inactive below. Other times I get inactive on top, active below.