Had the same issue on upgrade from 9.04 to 9.10 ; removing manually as in https://bugs.launchpad.net/ubuntu/+source/xulrunner-1.9/+bug/370093/comments/11 and https://bugs.launchpad.net/ubuntu/+source/xulrunner-1.9/+bug/370093/comments/12 helped.
Maybe the issue was in me having xulrunner 1.9.1 in 9.04; however the default universe version for xulrunner in both 9.04 and 9.10 seems to be 1.8.1.16 ??
Had the same issue on upgrade from 9.04 to 9.10 ; removing manually as in https:/ /bugs.launchpad .net/ubuntu/ +source/ xulrunner- 1.9/+bug/ 370093/ comments/ 11 and https:/ /bugs.launchpad .net/ubuntu/ +source/ xulrunner- 1.9/+bug/ 370093/ comments/ 12 helped.
Maybe the issue was in me having xulrunner 1.9.1 in 9.04; however the default universe version for xulrunner in both 9.04 and 9.10 seems to be 1.8.1.16 ??