Help deleting an empty folder

I've got an empty folder in my vault that can't be deleted.  I have full admin rights and no matter what I try, when I try to delete the folder I get a dialog that reads "Could not delete folder from the vault" - "The folder is not empty".   Is there some other way to get rid of this folder?

In case it matters, I'm using EPDM 2009 SP4.

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