Firefox cannot be resized downwards without crashing

[Tony Mugan]

I'm using Ubuntu Natty Narwhal with all the latest updates applied.
I just installed Thunderbird and was having some issues getting it to setup gmail accounts.
Then I tried running Firefox to research the issue and its window was reduced to just the title bar at the top of the window.

When I attempt to resize this window downwards it crashes every time.
If I move it down the screen and resize it upwards it works however if a restart Firefox the whole rigmarole starts again.

Here is the error when it crashes

me@mypc:~$ firefox

(firefox-bin:2782): LIBDBUSMENU-GTK-CRITICAL **: dbusmenu_menuitem_property_set_shortcut: assertion `gtk_accelerator_valid(key, modifier)' failed
###!!! ABORT: X_ShapeRectangles: BadMatch (invalid parameter attributes); 66 requests ago: file /build/buildd/firefox-6.0.2+build2+nobinonly/build-tree/mozilla/toolkit/xre/nsX11ErrorHandler.cpp, line 199
###!!! ABORT: X_ShapeRectangles: BadMatch (invalid parameter attributes); 66 requests ago: file /build/buildd/firefox-6.0.2+build2+nobinonly/build-tree/mozilla/toolkit/xre/nsX11ErrorHandler.cpp, line 199

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: firefox 6.0.2+build2+nobinonly-0ubuntu0.11.04.1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic-pae 2.6.38.8
Uname: Linux 2.6.38-11-generic-pae i686
Architecture: i386
Date: Tue Sep 20 11:06:39 2011
FirefoxPackages:
 firefox 6.0.2+build2+nobinonly-0ubuntu0.11.04.1
 flashplugin-installer N/A
 adobe-flashplugin 10.3.183.7-0natty1
 icedtea-plugin 1.1.1-0ubuntu1~11.04.1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)

[Tony Mugan (tmugan)]

I think this may have been coincidental in the fact that I installed Thunderbird at the same time as installing some other updates.
The machine has now been updated to Oneiric Beta so I can no longer test this.

Please close.

[Tony Mugan (tmugan)]

The issue may have been to do with the window manager since I could also not move a Nautilus window between screens, the title bar would not move past the window boundary.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Paul White (paulw2u)]

Reporter has asked for bug to be closed. Although confirmed there has been no activity for 8 years. If anyone is still seeing this issue they should change the status back to "New" and comment here or better still create a new bug report so that their own logs are attached.