recuring problems with verification of VirtualBox downloads

[stan]

I am having recuring problems with the irtualBox archive. I am getting
errors that look like this:

W: A error occurred during the signature verification. The repository is
not updated and the previous index files will be used.GPG error:
http://download.virtualbox.org lucid Release: The following signatures were
invalid: BADSIG 54422A4B98AB5139 Oracle Corporation (VirtualBox archive
signing key) <info at virtualbox.org>

I found an article that sugested cleaning up various files in /var/cache
and /var/lib for partial downloads, and I have managed to get this fixed a
couple of times by doing that. I am having a bitof a problem finding that
exact article at the moment, but I _think_ I have cleaned these up, but I
am back to getting this error on several diferent machines.

Any sugestions?


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