>>>http://www.planetrugby.com/story/0,25883,3551_65975,00.html
>
>Reported incidents rise when interest in the topic grows. My expectation is that tackle rules will change to protect player heads. And there's a chance that scrum caps/head guards will become the norm, even compulsory.

its an increase in player weight and fitness causing greater concussive tackling impact. exactly the problem US football is experiencing. Little to do with scrummaging.