Cannot move folder, Vault reports checked out when it isn't

[awdavis]

I'm trying to move a folder in my repository under Vault 4.0.2. I have searched the folder and no files in it or any subfolders are checked out. When I move it, it says the transaction fails:

2007 12:18:35 PM] Preparing data to begin transaction
[8/8/2007 12:18:35 PM] Beginning transaction
[8/8/2007 12:18:35 PM] Item $/FlashCT/FlashCT Utilities/Iluma Galil Control caused the transaction to fail: The object could not be modified because it or one of its children is checked out.
[8/8/2007 12:18:35 PM] Transaction failed

I've done the normal things. I've restarted the Vault server and cleared out my local cache. It appears to be broken.

[ian_sg]

Does the admin tool (the web interface) list any files checked out beneath the folder in question?

[awdavis]

Yes indeed a file showed checked-out in the admin tool that does not appear checked-out in the client. I did an undo check out and then was able to move the folder. Pretty strange.