Firefox freezes with multiple tabs

Binary package hint: firefox-3.5

With multiple tabs open each having some flash content, Firefox will hang completely.
Ubuntu 9.10
System76 Gazelle Ultra hardware

Flash is crashing.

root@hiawatha:/var/log# cat /var/log/syslog | grep -i npviewer | grep -i segfault
Nov 15 11:14:09 hiawatha kernel: [ 4788.976642] npviewer.bin[3974]: segfault at f1096edf ip 00000000f1096edf sp 00000000ffca99a4 error 14
Nov 15 16:39:36 hiawatha kernel: [ 5828.694879] npviewer.bin[29767]: segfault at ff99cd48 ip 00000000ff99cd48 sp 00000000ffeb529c error 14
Nov 15 17:14:32 hiawatha kernel: [ 7924.765299] npviewer.bin[16603]: segfault at ff99cd48 ip 00000000ff99cd48 sp 00000000ffa5e87c error 14
Nov 15 20:58:50 hiawatha kernel: [ 4245.971022] npviewer.bin[16485]: segfault at ff99cd48 ip 00000000ff99cd48 sp 00000000ffc4637c error 14
Nov 15 20:59:12 hiawatha kernel: [ 4267.753395] npviewer.bin[18512]: segfault at ff99cd48 ip 00000000ff99cd48 sp 00000000ffa0130c error 14

ProblemType: Bug
Architecture: amd64
Date: Mon Nov 16 18:55:30 2009
DistroRelease: Ubuntu 9.10
Package: firefox-3.5 3.5.5+nobinonly-0ubuntu0.9.10.1
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: firefox-3.5
Uname: Linux 2.6.31-14-generic x86_64
XsessionErrors:
 (gnome-settings-daemon:6511): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:6511): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:6735): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:6803): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (gnome-panel:6703): Gtk-WARNING **: gtk_widget_size_allocate(): attempt to allocate widget with width -5 and height 24