I have the exact same problem, I just installed Gutsy Tribe 2, installed firefox through aptitude, and i get this exact same error when running for the first time.
I could not find any lock-files, i can tell you that even though i cannot start firefox, the profile-manager does appear to create 2 (0-size) files when i try to make a profile. Hope this helps in some way. -- Can't start Firefox https://bugs.launchpad.net/bugs/123917 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs