Steps to reproduce: 1. Go http://packages.gentoo.org/packages/?category=media-tv;name=mythtv 2. Look where "Homepage" points (for me it's http://subversion.tigris.org/) This might be because the ebuild iherits both mythtv and subversion eclasses...
I's been fixed somehow... Feel free to close it. Another package, x11-themes/mythtv-themes still points to http://subversion.tigris.org/ however.
I see the issue. subversion.eclass incorrectly set HOMEPAGE. I've just fixed that. You should see this fixed everywhere shortly.