Plugged media notifier not opening precise 12.04

My usb harddrive will not open the plugged media notifier on Precise 12.04 with TDE 3.5.13.2. If I log out and back in to the xfce4 desktop the usb harddrive is detected and mounts ok. I also have Lucid 10.04 with TDE and Hardy 8.04 with KDE3 on the same machine and the plugged media notifier works ok on them. On a new machine I have recently installed Precise 12.04 with TDE 3.5.13.2 which installed with no problems whatsoever (Asrock M3A785GM-LE/128M) and the plugged media notifier works as expected. On the Precise 12.04 with the problem, I ran tail -f /var/log/syslog and the usb harddrive is detected ok and shows the two partitions on it as below. Jul 7 12:30:28 ubuntu-desktop kernel: [ 5924.180024] usb 1-7: new high-speed USB device number 4 using ehci_hcd Jul 7 12:30:28 ubuntu-desktop kernel: [ 5924.248237] hub 1-0:1.0: unable to enumerate USB device on port 7 Jul 7 12:30:28 ubuntu-desktop kernel: [ 5924.704028] usb 2-7: new full-speed USB device number 4 using ohci_hcd Jul 7 12:30:28 ubuntu-desktop kernel: [ 5924.904956] usb 2-7: not running at top speed; connect to a high speed hub Jul 7 12:30:28 ubuntu-desktop kernel: [ 5924.934473] usb-storage 2-7:1.0: Quirks match for vid 152d pid 2329: 8020 Jul 7 12:30:28 ubuntu-desktop kernel: [ 5924.936142] scsi7 : usb-storage 2-7:1.0 Jul 7 12:30:28 ubuntu-desktop mtp-probe: checking bus 2, device 4: "/sys/devices/pci0000:00/0000:00:02.0/usb2/2-7" Jul 7 12:30:28 ubuntu-desktop mtp-probe: bus: 2, device: 4 was not an MTP device Jul 7 12:30:29 ubuntu-desktop kernel: [ 5925.944980] scsi 7:0:0:0: Direct-Access WDC WD50 00AAKX-00ERMA0 15.0 PQ: 0 ANSI: 2 CCS Jul 7 12:30:29 ubuntu-desktop kernel: [ 5925.951726] sd 7:0:0:0: Attached scsi generic sg6 type 0 Jul 7 12:30:29 ubuntu-desktop kernel: [ 5925.958973] sd 7:0:0:0: [sde] 976773168 512-byte logical blocks: (500 GB/465 GiB) Jul 7 12:30:29 ubuntu-desktop kernel: [ 5925.971984] sd 7:0:0:0: [sde] Write Protect is off Jul 7 12:30:29 ubuntu-desktop kernel: [ 5925.971989] sd 7:0:0:0: [sde] Mode Sense: 28 00 00 00 Jul 7 12:30:29 ubuntu-desktop kernel: [ 5925.984971] sd 7:0:0:0: [sde] No Caching mode page found Jul 7 12:30:29 ubuntu-desktop kernel: [ 5925.984977] sd 7:0:0:0: [sde] Assuming drive cache: write through Jul 7 12:30:29 ubuntu-desktop kernel: [ 5926.022515] sd 7:0:0:0: [sde] No Caching mode page found Jul 7 12:30:29 ubuntu-desktop kernel: [ 5926.022519] sd 7:0:0:0: [sde] Assuming drive cache: write through Jul 7 12:30:29 ubuntu-desktop kernel: [ 5926.042053] sde: sde1 sde2 Jul 7 12:30:29 ubuntu-desktop kernel: [ 5926.110974] sd 7:0:0:0: [sde] No Caching mode page found Jul 7 12:30:29 ubuntu-desktop kernel: [ 5926.110979] sd 7:0:0:0: [sde] Assuming drive cache: write through Jul 7 12:30:29 ubuntu-desktop kernel: [ 5926.110983] sd 7:0:0:0: [sde] Attached SCSI disk Jul 7 12:30:54 ubuntu-desktop kernel: [ 5950.279533] usb 2-7: USB disconnect, device number 4 ^Cdjmons@ubuntu-desktop:~$ I get the same as the above with the new install of Precise 12.04 but then the plugged media notifier opens and when I click on ok I get a few more lines of output and the harddrive is mounted and opens the partitions in konqueror. Apart from reinstalling TDE default settings and the desktop has anyone any suggestions as to how to troubleshoot the problem that TDE seems to have in opening the plugged media notifier on this install? Thanks in advance, Nigel.