Firefox won't launch, quits with segmentation fault, uncaught by apport

[Chris Sykes]

Binary package hint: firefox

I'm running 32-bit kubuntu lucid on an external hard drive. Every time I try to launch firefox, no windows open and the bouncing firefox icon disappears without anything happening. Launching from terminal just prints "Segmentation Fault (Core Dumped)" and quits without opening any windows.
Same thing happens with GIMP, which I've reported here: https://bugs.launchpad.net/ubuntu/+source/gimp/+bug/540035
I can launch the profile manager, but when I click "Create Profile" the application quits.

For some reason this crash doesn't seem to get picked up by apport, so that's why I haven't attached any extra info [as yet].

ProblemType: Bug
Architecture: i386
Date: Wed Mar 17 04:14:42 2010
DistroRelease: Ubuntu 10.04
FirefoxPackages:
 firefox 3.6+nobinonly-0ubuntu6
 firefox-gnome-support N/A
 firefox-branding 3.6+nobinonly-0ubuntu6
 abroswer N/A
 abrowser-branding N/A
InstallationMedia: Kubuntu 10.04 "Lucid Lynx" - Alpha i386 (20100225)
Package: firefox 3.6+nobinonly-0ubuntu6
ProcEnviron:
 LANGUAGE=
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-16.25-generic
SourcePackage: firefox
Uname: Linux 2.6.32-16-generic i686

[Chris Sykes (jcgs)]

This is what happened when I ran GDB on it, and did lots of backtracing

[Chris Sykes (jcgs)]

Turns out the problem is with pango-graphite. Not sure why it was installed (because it wasn't required by anything) but when it is installed firefox and GIMP both segfault, and when it's not installed they're both fine. What should I do, report it separately?