"Component is not available" error msg

[MatJak]

Binary package hint: firefox-3.0

I load a page containing AJAX an gets this message, when the AJAX is supposed to run..
[Exception... "Component is not available" nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)" location: "JS frame :: file:///usr/lib/firefox-3.0.9/components/nsSessionStore.js :: sss_saveState :: line 1909" data: no]

This is just after updating to FF 3.0.9 from the automatic updater in Ubuntu.

Ubuntu: Ubuntu 8.10 - Intrepid Ibex

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 8.10
NonfreeKernelModules: nvidia
Package: firefox-3.0 3.0.9+nobinonly-0ubuntu0.8.10.1
ProcEnviron:
 PATH=/home/username/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=da_DK.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.27-11-generic i686