libwebkitgtk-1.0 crashed with SIGSEGV in WTF::OSAllocator::reserveAndCommit

[Jens]

Binary package hint: gwibber

gwibber first showed an empty window and then crashed after clicking the add button for adding a new account

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: gwibber 2.91.2-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-1.28-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic x86_64
Architecture: amd64
Date: Wed Feb 2 14:17:01 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gwibber-accounts
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release Candidate amd64 (20100928)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/gwibber-accounts
ProcEnviron:
 SHELL=/bin/bash
 LC_MESSAGES=en_US.utf8
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7fb1b51055c5: movl $0x0,(%rdx)
 PC (0x7fb1b51055c5) ok
 source "$0x0" ok
 destination "(%rdx)" (0xbbadbeef) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: gwibber
StacktraceTop:
 ?? () from /usr/lib/libwebkitgtk-1.0.so.0
 ?? () from /usr/lib/libwebkitgtk-1.0.so.0
 ?? () from /usr/lib/libwebkitgtk-1.0.so.0
 ?? () from /usr/lib/libwebkitgtk-1.0.so.0
 ?? () from /usr/lib/libwebkitgtk-1.0.so.0
Title: gwibber-accounts crashed with SIGSEGV
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 WTF::OSAllocator::reserveAndCommit (
 ?? ()
 ?? () from /usr/lib/libwebkitgtk-1.0.so.0
 ?? ()

[Jens (jens.timmerman)]

I installed libwebkitgtk-1.0-0-dbgsym and created a manual backtrace as explained here https://wiki.ubuntu.com/Backtrace