pcmanfm crashed with SIGSEGV in os_bar_init()

Tried to open gnome-terminal.

doru@doru-laptop:~$ lsb_release -rd
Description: Ubuntu precise (development branch)
Release: 12.04

doru@doru-laptop:~$ apt-cache policy overlay-scrollbar
overlay-scrollbar:
  Installed: 0.2.13-0ubuntu2
  Candidate: 0.2.13-0ubuntu2
  Version table:
 *** 0.2.13-0ubuntu2 0
        500 http://ftp.roedu.net/mirrors/ubuntulinux.org/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status
     0.2.13-0ubuntu1 0
        500 http://ftp.roedu.net/mirrors/ubuntulinux.org/ubuntu/ precise/main amd64 Packages

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: overlay-scrollbar 0.2.13-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-4.10-generic 3.2.0-rc5
Uname: Linux 3.2.0-4-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
Date: Tue Dec 13 00:27:28 2011
ExecutablePath: /usr/bin/pcmanfm
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705.1)
PackageArchitecture: all
ProcCmdline: pcmanfm --desktop --profile lubuntu
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f69fc98ac0b: cmpq $0x0,0x40(%rax)
 PC (0x7f69fc98ac0b) ok
 source "$0x0" ok
 destination "0x40(%rax)" (0xaaaaaaaaaaaaaaea) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: overlay-scrollbar
StacktraceTop:
 ?? () from /usr/lib/liboverlay-scrollbar-0.2.so.0
 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
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: pcmanfm crashed with SIGSEGV in g_closure_invoke()
UpgradeStatus: Upgraded to precise on 2011-12-11 (1 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare