I'm having this problem too, on Ubuntu Dapper 32bit. There's a voluminous thread on
http://www.nabble.com/Firefox---Unexpected-response-from- server-t3306658.html -- Opening firefox by clicking on links in thunderbird breaks https https://launchpad.net/bugs/57923 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
