Still doesn't cleanup /lib/modules/$(uname -r) properly

Hi

I got bug #348395 again in karmic; I'm opening a new bug since the other one was against jaunty and was claimed to be fix, so I assume I must be seeing another bug.

After purging old linux-image packages on my laptop, I still see:
/lib/modules/2.6.31-3-generic
/lib/modules/2.6.31-4-generic
/lib/modules/2.6.31-5-generic
all of them with the same files:
/lib/modules/2.6.31-5-generic/modules.alias.bin
/lib/modules/2.6.31-5-generic/modules.dep.bin
/lib/modules/2.6.31-5-generic/modules.symbols.bin

on my desktop, I see the same thing:
dpkg: warning: while removing linux-image-2.6.31-4-generic, directory '/lib/modules/2.6.31-4-generic' not empty so not removed.
...

% find /lib/modules/2.6.31-5-generic
/lib/modules/2.6.31-5-generic
/lib/modules/2.6.31-5-generic/modules.dep.bin
/lib/modules/2.6.31-5-generic/modules.alias.bin
/lib/modules/2.6.31-5-generic/modules.symbols.bin

dpkg: warning: while removing linux-image-2.6.31-5-generic, directory '/lib/modules/2.6.31-5-generic' not empty so not removed.

Thanks

ProblemType: Bug
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: lool 6453 F.... pulseaudio
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0620000 irq 17'
   Mixer name : 'Conexant CX20561 (Hermosa)'
   Components : 'HDA:14f15051,17aa211f,00100000'
   Controls : 14
   Simple ctrls : 7
Date: Wed Aug 19 12:12:11 2009
DistroRelease: Ubuntu 9.10
MachineType: LENOVO 2777CTO
Package: linux-image-2.6.31-6-generic 2.6.31-6.25
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.31-6-generic root=/dev/mapper/hostname--vg0-ubuntu--root ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/zsh
ProcVersionSignature: Ubuntu 2.6.31-6.25-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-6-generic N/A
 linux-firmware 1.16
SourcePackage: linux
Uname: Linux 2.6.31-6-generic x86_64
WpaSupplicantLog:

dmi.bios.date: 03/12/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 6EET27WW (1.08 )
dmi.board.name: 2777CTO
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:bvr6EET27WW(1.08):bd03/12/2009:svnLENOVO:pn2777CTO:pvrThinkPadX301:rvnLENOVO:rn2777CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2777CTO
dmi.product.version: ThinkPad X301
dmi.sys.vendor: LENOVO