mountmanager won't mount any usb drives

[Bouba]

Ubuntu 9.04
2.6.28-11-generic

mountmanager:
  Installé : 0.2.6-0ubuntu2
  Candidat : 0.2.6-0ubuntu2
 Table de version :
 *** 0.2.6-0ubuntu2 0

[ 85.200024] usb 1-7: new high speed USB device using ehci_hcd and address 4
[ 85.345521] usb 1-7: configuration #1 chosen from 1 choice
[ 85.404504] Initializing USB Mass Storage driver...
[ 85.404777] scsi4 : SCSI emulation for USB Mass Storage devices
[ 85.404938] usb-storage: device found at 4
[ 85.404945] usb-storage: waiting for device to settle before scanning
[ 85.404952] usbcore: registered new interface driver usb-storage
[ 85.404958] USB Mass Storage support registered.
[ 85.500029] Clocksource tsc unstable (delta = -75998741 ns)
[ 90.400343] usb-storage: device scan complete
[ 90.449827] scsi 4:0:0:0: Direct-Access USB DISK 2.0 PMAP PQ: 0 ANSI: 0 CCS
[ 90.798800] sd 4:0:0:0: [sdd] 15654912 512-byte hardware sectors: (8.01 GB/7.46 GiB)
[ 90.799277] sd 4:0:0:0: [sdd] Write Protect is off
[ 90.799282] sd 4:0:0:0: [sdd] Mode Sense: 23 00 00 00
[ 90.799287] sd 4:0:0:0: [sdd] Assuming drive cache: write through
[ 90.802537] sd 4:0:0:0: [sdd] 15654912 512-byte hardware sectors: (8.01 GB/7.46 GiB)
[ 90.803023] sd 4:0:0:0: [sdd] Write Protect is off
[ 90.803029] sd 4:0:0:0: [sdd] Mode Sense: 23 00 00 00
[ 90.803034] sd 4:0:0:0: [sdd] Assuming drive cache: write through
[ 90.803047] sdd: sdd1
[ 90.857312] sd 4:0:0:0: [sdd] Attached SCSI removable disk
[ 90.857445] sd 4:0:0:0: Attached scsi generic sg4 type 0

[ 91.891577] mountmanager[4380]: segfault at 4 ip b7652ca7 sp bfecc70c error 4 in libQtGui.so.4.5.0[b74ee000+9c6000]

i can see this usb key, but cannot mount it.

I can mount this usb key if i set it in fstab and do a mount -a