WARNING: at /build/buildd/linux-2.6.38/ubuntu/aufs/plink.c:450 au_plink_put+0x4c/0xa0 [aufs]()

Every time I exit from a 'schroot' session apport pops up with this problem report. Its possible this started around the time I updated to 2.6.38-8.

Steps to reproduce:

(assuming existing working schroot made with 'mk-sbuild')

1. schroot -c natty-amd64 -u root
2. apt-get install vim
3. exit
-- error happens

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: root 1422 F.... pommed
                      clint 15714 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'NVidia'/'HDA NVidia at 0xdf480000 irq 21'
   Mixer name : 'Realtek ALC889A'
   Components : 'HDA:10ec0885,106b4000,00100103'
   Controls : 36
   Simple ctrls : 20
Date: Tue Apr 12 12:09:51 2011
Failure: oops
HibernationDevice: RESUME=UUID=8bc3e467-6c70-4013-b164-5df3de0326f2
InstallationMedia: Xubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008.1)
MachineType: Apple Inc. MacBookPro5,1
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=ed27950b-c6c0-4232-aa2b-c545364a68b8 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic N/A
 linux-firmware 1.50
SourcePackage: linux
Title: WARNING: at /build/buildd/linux-2.6.38/ubuntu/aufs/plink.c:450 au_plink_put+0x4c/0xa0 [aufs]()
UpgradeStatus: Upgraded to natty on 2011-01-12 (90 days ago)
dmi.bios.date: 05/05/09
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP51.88Z.007E.B05.0905051508
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-F42D86C8
dmi.board.vendor: Apple Inc.
dmi.board.version: Proto
dmi.chassis.asset.tag: Asset Tag#
dmi.chassis.type: 8
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-F42D86C8
dmi.modalias: dmi:bvnAppleInc.:bvrMBP51.88Z.007E.B05.0905051508:bd05/05/09:svnAppleInc.:pnMacBookPro5,1:pvr1.0:rvnAppleInc.:rnMac-F42D86C8:rvrProto:cvnAppleInc.:ct8:cvrMac-F42D86C8:
dmi.product.name: MacBookPro5,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.