Mozilla has patched several flaws, three of which are rated as critical, in its browsers
http://chkpt.zdnet.com/chkpt/ukzdfeed/http://news.zdnet.co.uk/software/applications/0,39020384,39195483,00.htm
http://chkpt.zdnet.com/chkpt/ukzdfeed/http://news.zdnet.co.uk/software/applications/0,39020384,39195483,00.htm