Karmic Koala does not automount usb devices

Binary package hint: nautilus

Dear all,
a fresh (stable) 64 bit installation of ubuntu 9.10 does not automatically mount usb devices (sticks & hd's) when they are plugged in.

uname -a:
Linux sektor 2.6.31-14-generic #48-Ubuntu SMP Fri Oct 16 14:05:01 UTC 2009 x86_64 GNU/Linux

Messages output after plugging in a usb stick:
Nov 1 23:54:46 sektor kernel: [ 4130.080294] usb 2-2: new high speed USB device using ehci_hcd and address 5
Nov 1 23:54:47 sektor kernel: [ 4130.234453] usb 2-2: configuration #1 chosen from 1 choice
Nov 1 23:54:47 sektor kernel: [ 4130.375930] Initializing USB Mass Storage driver...
Nov 1 23:54:47 sektor kernel: [ 4130.377210] scsi6 : SCSI emulation for USB Mass Storage devices
Nov 1 23:54:47 sektor kernel: [ 4130.377479] usbcore: registered new interface driver usb-storage
Nov 1 23:54:47 sektor kernel: [ 4130.377487] USB Mass Storage support registered.
Nov 1 23:54:52 sektor kernel: [ 4135.371522] scsi 6:0:0:0: Direct-Access Memorex TD Classic 003B PMAP PQ: 0 ANSI: 0 CCS
Nov 1 23:54:52 sektor kernel: [ 4135.372563] sd 6:0:0:0: Attached scsi generic sg2 type 0
Nov 1 23:54:52 sektor kernel: [ 4135.560197] sd 6:0:0:0: [sdb] 2015232 512-byte logical blocks: (1.03 GB/984 MiB)
Nov 1 23:54:52 sektor kernel: [ 4135.561048] sd 6:0:0:0: [sdb] Write Protect is off
Nov 1 23:54:52 sektor kernel: [ 4135.564325] sdb: sdb1
Nov 1 23:54:52 sektor kernel: [ 4135.582783] sd 6:0:0:0: [sdb] Attached SCSI removable disk

It looks similar when using udb hd's.

I have tried this with a usb stick (fat32), a 2,5" hd with ext3 and a 3,5" hd (encrypted with LUKS and ext3 as fs). It looks always the same, no errors/warnings in messages. Manually mounting (with cryptsetup for the luks disk of course) works perfect, no strange behavior.

It seems that gnome isn't getting the trigger to recognize these devices.

This problem does not only apply to me: http://ubuntuforums.org/showthread.php?t=1309239

I have installed karmic from the alternate cd with ext3 as fs for the root fs.

Thank You,
sektor

ProblemType: Bug
Architecture: amd64
Date: Mon Nov 2 00:04:59 2009
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/nautilus
Package: nautilus 1:2.28.1-0ubuntu1
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
SourcePackage: nautilus
Uname: Linux 2.6.31-14-generic x86_64