Error message on Package Export

Hi, I'm having a problem exporting a managed package to a file.  During the export, I get these notices:

I don't want to say I'm in a hurry to correct this, but I am!  :)

Subsequently, I get this error message after hitting OK:

I've tried logging on as "admin", and also using our other administrator account and I get the same error, whether it's a 32-bit or 64-bit export.

I've never had this problem trying to export a package before.

Anyone know what I can do to get this to export properly?

Thanks,
Dan