Further to the above report, running killall firefox and restarting did not resolve either issue, but rebooting the machine appears to have done so.
help - about now shows 'version version 3.0.13 Mozilla firefox for Ubuntu canonical - 1.0' and the user agent string is 'Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.9.0.13) Gecko/2009080315 Ubuntu/9.04 (jaunty) Firefox/3.0.13'
Further to the above report, running killall firefox and restarting did not resolve either issue, but rebooting the machine appears to have done so.
help - about now shows 'version version 3.0.13 Mozilla firefox for Ubuntu canonical - 1.0' and the user agent string is 'Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.9.0.13) Gecko/2009080315 Ubuntu/9.04 (jaunty) Firefox/3.0.13'