Date: 05/07/11 (Mozilla)    Keywords: software

The latest version of keyscrambler personal (free version) doesn't play well with beef TACO, preventing login to basic sites, e.g. gmail. This user opted to uninstall TACO and reinstall keyscrambler, test machine runs WinXP SP3 and Firefox 4.0.1

relevant links
keyscrambler http://www.qfxsoftware.com/
keyscrambler http://support.mozilla.com/en-US/questions/787241
beef TACO https://addons.mozilla.org/en-us/firefox/addon/beef-taco-targeted-advertising/

Source: http://mozilla.livejournal.com/449457.html