Flash consistently causes either a hard lock or a segfault

Binary package hint: firefox

I don't know if this is more appropriate to post here, but browsing with either flash 9 or flash 10 causes firefox to occasionally either vanish with a segfault or lock hard. I have attached a debug log/backtrace to help diagnose.

On a related note, a lot of the bug-posting tutorial doesn't match up with firefox3.0 (specifically the *-dbg packages), so I didn't know how to provide a lot of the other information that was asked for. If there's something else that's needed, I can provide it though.

apt-cache amelo@amelo-laptop:~$ apt-cache policy firefox
firefox:
  Installed: 3.0.1+build1+nobinonly-0ubuntu0.8.04.3
  Candidate: 3.0.1+build1+nobinonly-0ubuntu0.8.04.3
  Version table:
 *** 3.0.1+build1+nobinonly-0ubuntu0.8.04.3 0
        500 http://us.archive.ubuntu.com hardy-updates/main Packages
        500 http://security.ubuntu.com hardy-security/main Packages
        100 /var/lib/dpkg/status
     3.0~b5+nobinonly-0ubuntu3 0
        500 http://us.archive.ubuntu.com hardy/main Packages
amelo@amelo-laptop:~$ apt-cache policy xulrunner-1.9
xulrunner-1.9:
  Installed: 1.9.0.1+build1+nobinonly-0ubuntu0.8.04.3
  Candidate: 1.9.0.1+build1+nobinonly-0ubuntu0.8.04.3
  Version table:
 *** 1.9.0.1+build1+nobinonly-0ubuntu0.8.04.3 0
        500 http://us.archive.ubuntu.com hardy-updates/main Packages
        500 http://security.ubuntu.com hardy-security/main Packages
        100 /var/lib/dpkg/status
     1.9~b5+nobinonly-0ubuntu3 0
        500 http://us.archive.ubuntu.com hardy/main Packages