I seem to have had both 1.9 and 1.9.2 installed: (Tested with "dpkg -l xulrunner*")
ii xulrunner-1.9 1.9.0.14+build2+nobinonly-0ubuntu1 XUL + XPCOM application runner
ii xulrunner-1.9-gnome-support 1.9.0.14+build2+nobinonly-0ubuntu1 Support for Gnome in xulrunner-1.9 applications
rc xulrunner-1.9.1 1.9.1.8+build1+nobinonly-0ubuntu1 XUL + XPCOM application runner
un xulrunner-1.9.1-gnome-support <none> (no description available)
ii xulrunner-1.9.2 1.9.2+nobinonly-0ubuntu1 XUL + XPCOM application runner
I seem to have had both 1.9 and 1.9.2 installed: (Tested with "dpkg -l xulrunner*")
ii xulrunner-1.9 1.9.0.14+ build2+ nobinonly- 0ubuntu1 XUL + XPCOM application runner 1.9-gnome- support 1.9.0.14+ build2+ nobinonly- 0ubuntu1 Support for Gnome in xulrunner-1.9 applications build1+ nobinonly- 0ubuntu1 XUL + XPCOM application runner 1.9.1-gnome- support <none> (no description available) -0ubuntu1 XUL + XPCOM application runner
ii xulrunner-
rc xulrunner-1.9.1 1.9.1.8+
un xulrunner-
ii xulrunner-1.9.2 1.9.2+nobinonly
Removing 1.9 fixed the problem for me:
sudo apt-get remove xulrunner-1.9