Firefox in Sugar hangs on exit

[Edward Cherlin]

Binary package hint: sugar-firefox-activity

Natty Narwhal 11.04
sugar-firefox-activity 6+dfsg-0ubuntu2

On exiting Firefox via Archivos:Salir, the icon remains on the frame, fading in and out. Message:

Firefox failed to start. [sic]

The user must click Stop to end Firefox.

~/.sugar/default/logs/org.laptop.FirefoxActivity-1

(process:5138): Gtk-WARNING **: Locale not supported by C library.
 Using the fallback 'C' locale.

(firefox-bin:5138): Gdk-WARNING **: locale not supported by C library

(firefox-bin:5138): GnomeUI-WARNING **: While connecting to session manager:
None of the authentication protocols specified are supported.
Exited with status 0, pid 5138 data (None, <open file '<fdopen>', mode 'w' at 0xa2b4b78>, 'a1acdb1cc5012df66ba8d98f771a8c99601a620b')

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: sugar-firefox-activity 6+dfsg-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Thu May 26 16:25:46 2011
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=es_MX:en_US:en
 PATH=(custom, user)
 LANG=es_ES.utf8
 LC_MESSAGES=es_MX.UTF-8
 SHELL=/bin/bash
SourcePackage: sugar-firefox-activity
UpgradeStatus: Upgraded to natty on 2011-05-01 (25 days ago)