File_column, image_tag, absolute paths?

The docs in the SVN version of file_column state that
url_for_file_column
will return paths relative to the application root, and that if I pass
it
to image_tag, I’ll get an absolute URL.

This doesn’t appear to be the case, at least with Rails 1.1. image_tag
returns the same app-root-based path that it’s given.

Doc bug? Rails change? file_column bug?

Jay L.