New problem noticed today in Firefox 4.0.1 (Windows XP): When I have Firefox's Options window open and click OK or Cancel to close it, the window closes normally and then immediately pops open again. I then need to click OK or Cancel a second time to close it for good. I have tried rebooting Windows, no change. The only change I made today is to install the Googlebar Lite Add-on and remove Google Toolbar for Firefox. Suggestions? Thanks!