Workflow task causing error with forms server

See post here: http://forums.microsoft.com/TechNet/ShowPost.aspx?PostID=1230066&SiteID=17

I have a form published via forms server. Then I associate the approval workflow with the form. I fill out the form and submit it to the library. Once I finish this process my approver gets an email telling them to review the form and approve the task.

They click on the link to review the form and they get this error message:

The URL /.xml is an unsupported relative URL. Use an absolute URL or prefix with '~sitecollection', for a site-collection-relative URL.