Hi people! I would ask you to watch this YouTube video. This guy tells that backlinks to different variations of my homepage - for example http:// domin.com and http:// domain.com/ - are not accumulated to ONE URL because Google realises them as TWO different URLs. Is that really true? If so, then a lot of link juice would be lost to that website, right? I have no idea if this guy is right!!
http://youtu.be/BhFcgDwp_pg