[Bug 755401] [NEW] Sometimes "Freezing" the system when "expand" button pressed.

[Gvozdik Artem]

Public bug reported:

Binary package hint: firefox

updated Natty, sometimes when I want to expand/maximize firefox window and press third button on a top left side of it system is not responding for any action, I can just move cursor, pressing the power button - no reaction either.
Probably not firefox bug, might be Unity.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: firefox 4.0~rc2+build3+nobinonly-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.41-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Sat Apr  9 14:08:47 2011
ExecutablePath: /usr/lib/firefox-4.0/firefox-bin
FirefoxPackages:
 firefox 4.0~rc2+build3+nobinonly-0ubuntu2
 flashplugin-installer N/A
 adobe-flashplugin 10.2.153.1-0maverick1
 icedtea-plugin 1.1~20110406-0ubuntu1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
XsessionErrors: (nautilus:1283): GConf-CRITICAL **: gconf_value_free: assertion `value != NULL' failed

** Affects: firefox
     Importance: Undecided
         Status: New

** Affects: unity
     Importance: Undecided
         Status: New

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 natty running-unity

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https://bugs.launchpad.net/bugs/755401

Title:
  Sometimes "Freezing" the system when "expand" button pressed.