I'm seeing it call -[WebFrame loadData:MIMEType:textEncodingName:baseURL:] with a base URL of just "/".
Created attachment 126365 [details]
Comment on attachment 126365 [details]
Clearing flags on attachment: 126365
Committed r107355: <http://trac.webkit.org/changeset/107355>
All reviewed patches have been landed. Closing bug.