hud-service crashed with SIGSEGV in g_list_remove()

Running Firefox with webapps installed on Ubuntu 12.04.

Apport just popped up after closing Firefox and switching workspace.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: indicator-appmenu 12.10.0-0ubuntu2~webapps1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
CrashDB: indicator_appmenu
Date: Thu Aug 30 22:17:34 2012
ExecutablePath: /usr/lib/indicator-appmenu/hud-service
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcCmdline: /usr/lib/indicator-appmenu/hud-service
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7fd13a32b9b9 <g_list_remove+9>: cmp %rsi,(%rdi)
 PC (0x7fd13a32b9b9) ok
 source "%rsi" ok
 destination "(%rdi)" (0x00000004) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: indicator-appmenu
StacktraceTop:
 g_list_remove () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libbamf3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libdbus-glib-1.so.2
 g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
ThirdParty: True
Title: hud-service crashed with SIGSEGV in g_list_remove()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip kvm libvirtd lpadmin plugdev sambashare sudo