Recently while importing a site export into a new SharePoint farm, I ran into the error:
FatalError: Could not find Feature TSAimage.
I did find some references to TSAImage with Google, but nothing specific. I finally tracked it down to a Feature that gets installed with the Fantastic Forty ApplicationTemplateCore solution. Apparently I had this installed on the original farm but not on the new one. Once I installed ApplicationTemplateCore.wsp and deployed it to the new site collection, stsadm happily imported everything.
You can find the ApplicationTemplateCore solution here.