I had the same problem with ubuntu 8.04 and upgrading to Ubuntu 8.10. I had also some other problem with the upgrade of Ubuntu 8.10 and so I have done a fresh installation (saving home and formatting) and now Firefox works.
I had the same problem with ubuntu 8.04 and upgrading to Ubuntu 8.10. I had also some other problem with the upgrade of Ubuntu 8.10 and so I have done a fresh installation (saving home and formatting) and now Firefox works.