firefox won't close, must be forced to close then must be "restored" on reopen

[Ed Stone]

Binary package hint: firefox-3.5

firefox 3.5.4
release 9.10
kernel 2.6.31-14 generic

tried to close app
got message "app not responding, force quit"

ProblemType: Bug
Architecture: i386
Date: Sat Nov 7 15:11:50 2009
DistroRelease: Ubuntu 9.10
NonfreeKernelModules: fglrx
Package: firefox-3.5 3.5.4+nobinonly-0ubuntu0.9.10.1
ProcEnviron:
 PATH=(custom, no 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 i686
XsessionErrors:
 (gnome-settings-daemon:7248): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:7248): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (polkit-gnome-authentication-agent-1:7358): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:7345): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (gnome-appearance-properties:7457): Gdk-CRITICAL **: gdk_display_sync: assertion `GDK_IS_DISPLAY (display)' failed