Puppet users - Apr 2013 - manifest digest mismatch error

I''m getting this error when trying to install the puppet tutorial
appliance
into virtualbox ...

Failed to import appliance *
C:\Users\Administrator\Desktop\learn_puppet_centos_pe2.7.0_ovf.2013.01.07\learn_puppet_centos_pe2.7.0_ovf.2013.01.07.ovf
*.

The SHA1 digest of
*''learn_puppet_centos_pe2.7.0_ovf.2013.01.07-disk1.vmdk''*does
not match the one in
*''learn_puppet_centos_pe2.7.0_ovf.2013.01.07.mf''*(VERR_MANIFEST_DIGEST_MISMATCH).
Result Code: VBOX_E_FILE_ERROR (0x80BB0004)Component: ApplianceInterface:
IAppliance
{3059cf9e-25c7-4f0b-9fa5-3c42e441670b}

I''m in virtualbox 4.2.12 and you can see the vmdk version above.

Can someone please give me a hand?  I''m anxious to learn puppet.

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I found the problem.  I had incorrectly tried to mount that file as a disk. 
 That must have corrupted the file.  I downloaded the file again and it 
worked when installing that as an appliance.

Now I just have to get the stupid networking and ssh working.

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