Aperture 2.1.1 Vault problem with external usb  disk

I have just updated to 2.1.1 and now Aperture freezes every time I connect my usb external disk and try to create or update a vault. I have to force quit Aperture and remove the disk before I can use Aperture again. The only way I can create a vault is to create it on my internal disk then manually copy to the external usb. Another topic here suggested the problem is with network disks but I have a very similar problem with a local usb disk. I have tried two different disks with the same results. All my software and os is up to date.
Does anyone else have this problem?

I have a similar problem, and have a not totally satisfactory fix for my issue.
I have my photos stored on an external FW drive.
Originally I also stored my vault on the same drive.
When I started Aperture with this config then Aperture would not pass the loading screen. I would have to kill the process to quit.
If I started Aperture with the FW drive disconnected then it would launch, but I would then attach eth FW drive and have to Manage referenced files.
What has worked for me:
I have removed the vault from the FW drive and Aperture now boots quickly as 2.1 did.
I have to create the vault on the internal HD and copy to the external.

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    If I disconnect the mouse at this stage, there is no change in kernel.log. If I the mouse back too, there is no change in kernel.log.
    Now, when I turn the AC adaptor on, this is the output on kernel.log
    Sep 12 11:22:16 localhost kernel: [ 813.917712] EXT4-fs (sda6): re-mounted. Opts: commit=0
    Sep 12 11:22:16 localhost kernel: [ 813.977405] NMI watchdog enabled, takes one hw-pmu counter.
    Sep 12 11:22:16 localhost kernel: [ 813.977453] NMI watchdog enabled, takes one hw-pmu counter.
    Sep 12 11:22:16 localhost kernel: [ 813.980838] NMI watchdog enabled, takes one hw-pmu counter.
    Sep 12 11:22:16 localhost kernel: [ 813.980874] NMI watchdog enabled, takes one hw-pmu counter.
    Sep 12 11:22:16 localhost kernel: [ 814.075104] ehci_hcd 0000:00:1a.0: BAR 0: set to [mem 0xd6970000-0xd69703ff] (PCI address [0xd6970000-0xd69703ff])
    Sep 12 11:22:16 localhost kernel: [ 814.075148] ehci_hcd 0000:00:1a.0: restoring config space at offset 0xf (was 0x100, writing 0x10b)
    Sep 12 11:22:16 localhost kernel: [ 814.075189] ehci_hcd 0000:00:1a.0: restoring config space at offset 0x1 (was 0x2900000, writing 0x2900002)
    Sep 12 11:22:16 localhost kernel: [ 814.075256] ehci_hcd 0000:00:1a.0: PME# disabled
    Sep 12 11:22:16 localhost kernel: [ 814.075279] ehci_hcd 0000:00:1a.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
    Sep 12 11:22:16 localhost kernel: [ 814.075295] ehci_hcd 0000:00:1a.0: setting latency timer to 64
    Sep 12 11:22:17 localhost kernel: [ 814.228224] ehci_hcd 0000:00:1d.0: BAR 0: set to [mem 0xd6950000-0xd69503ff] (PCI address [0xd6950000-0xd69503ff])
    Sep 12 11:22:17 localhost kernel: [ 814.228246] ehci_hcd 0000:00:1d.0: restoring config space at offset 0xf (was 0x100, writing 0x10a)
    Sep 12 11:22:17 localhost kernel: [ 814.228273] ehci_hcd 0000:00:1d.0: restoring config space at offset 0x1 (was 0x2900000, writing 0x2900002)
    Sep 12 11:22:17 localhost kernel: [ 814.228310] ehci_hcd 0000:00:1d.0: PME# disabled
    Sep 12 11:22:17 localhost kernel: [ 814.228324] ehci_hcd 0000:00:1d.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    Sep 12 11:22:17 localhost kernel: [ 814.228333] ehci_hcd 0000:00:1d.0: setting latency timer to 64
    Sep 12 11:22:17 localhost kernel: [ 814.614404] usb 2-1.1: reset low speed USB device number 3 using ehci_hcd
    At this point, the mouse comes back to life (its light begins to glow) and I can move the mouse pointer on the screen.
    The output of the grep command that rwd gave is too big (16000 lines) to be pasted here..
    Thanks,

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