update error

[Stefan]

Binary package hint: update-notifier

system is runing on a laptop. the problem appeared with disconected charger

ProblemType: Crash
Architecture: i386
CrashCounter: 1
Date: Sat Oct 31 11:22:02 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/lib/update-notifier/apt_check.py
InterpreterPath: /usr/bin/python2.6
Package: update-notifier-common 0.90
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/lib/update-notifier/apt-check
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SegvAnalysis:
 Segfault happened at: 0x48e924 <_ZN8pkgCache7FindPkgERKSs+132>: movzbl (%edi),%eax
 PC (0x0048e924) ok
 source "(%edi)" (0x2b658d6f) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: update-notifier
StacktraceTop:
 pkgCache::FindPkg(std::string const&) ()
 pkgCacheGenerator::NewPackage(pkgCache::PkgIterator&, std::string const&) () from /usr/lib/libapt-pkg-libc6.10-6.so.4.8
 pkgCacheGenerator::MergeList(pkgCacheGenerator::ListParser&, pkgCache::VerIterator*) () from /usr/lib/libapt-pkg-libc6.10-6.so.4.8
 debStatusIndex::Merge(pkgCacheGenerator&, OpProgress&) const
 ?? () from /usr/lib/libapt-pkg-libc6.10-6.so.4.8
Title: apt_check.py crashed with SIGSEGV in pkgCache::FindPkg()
Uname: Linux 2.6.31-14-generic i686
UserGroups: adm admin audio cdrom dialout dip floppy fuse lpadmin plugdev video