sometimes plymouth hangs before login screen with warning "unknown user id"

[Bastian]

Binary package hint: plymouth

system hangs sometime before displaying loginscreen.

GLib-WARNING **: getpwuid_r(). failed due to unknown user id (0)

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: plymouth 0.8.2-2ubuntu5
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
Architecture: i386
Date: Tue Oct 26 17:31:22 2010
DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: LENOVO 1951B45
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-22-generic root=/dev/mapper/t60--2-root ro quiet splash
ProcEnviron:
 LANG=de_DE.utf8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
SourcePackage: plymouth
TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
dmi.bios.date: 12/07/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 79ETE0WW (2.20 )
dmi.board.name: 1951B45
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr79ETE0WW(2.20):bd12/07/2007:svnLENOVO:pn1951B45:pvrThinkPadT60:rvnLENOVO:rn1951B45:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 1951B45
dmi.product.version: ThinkPad T60
dmi.sys.vendor: LENOVO