Just for reference this is our red dun tobiano APHA mare.  She has the dark ear tips, leg barring/spider webbing, and a dorsal stripe.
Sorry, can't post pics themselves, they're copyrighted(mine!) so I can't get the link.

http://www.flickr.com/photos/caodenthal/5471351062/in/set-72157625994451223
http://www.flickr.com/photos/caodenthal/5707316258/in/set-72157625994451223/  <--dorsal stripe
http://www.flickr.com/photos/caodenthal/5703579637/in/set-72157625994451223
http://www.flickr.com/photos/caodenthal/5703584075/in/set-72157625994451223