nautilus crashed with SIGSEGV after trying to close it

[KnightStalker]

This crash is happening repeatedly,and I can't think about how to reproduce it,but the last time it happened I was copying some files from my Ext. HDD to my home folder and some of them to their appropriate places(Downloads,Videos,Music)
I also did safely remove the Ext. HDD before closing nautilus
I had 2 nautilus window,closed one,no crash,closed second,and it told me that its not working correctly and I should force close it...

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: nautilus 1:3.1.4-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-9.15-generic 3.0.3
Uname: Linux 3.0.0-9-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
CrashCounter: 1
Date: Sat Sep 3 14:04:18 2011
ExecutablePath: /usr/bin/nautilus
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110901)
ProcCmdline: nautilus -n
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x810f1cd: mov 0x308(%eax),%eax
 PC (0x0810f1cd) ok
 source "0x308(%eax)" (0xaaaaadb2) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: nautilus
Stacktrace:
 #0 0x0810f1cd in ?? ()
 No symbol table info available.
 Cannot access memory at address 0xbfac9e9c
StacktraceTop: ?? ()
Title: nautilus crashed with SIGSEGV
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

Stacktrace:
 #0 0x0810f1cd in nautilus_icon_container_search_entry_flush_timeout (container=Cannot access memory at address 0xbfac9ea0
 ) at nautilus-icon-container.c:4947
 No locals.
 Cannot access memory at address 0xbfac9e9c
StacktraceTop: nautilus_icon_container_search_entry_flush_timeout (container=Cannot access memory at address 0xbfac9ea0