While using Hudson's **import_site** (Mercury) job to import my Pressflow site into my new Mercury server, I came across the following issues:
1. At first, I thought I'd be able to point the TARBALL argument to a remote http:// url. This did not work. I had to point to a local location.
2. Then I had to point to the untarred location, instead of the .tar file. (When pointing to my .tar file, I got this error: `Fatal error: Archive file "http://www.example.com/myarchive.tar" does not exist.`).