I’ve moved my blog to https a few weeks back and one of the first effects was the total loss of refferal traffic to people i link. Total. After some reading, i found out it was a common problem, but i also found a solution. And it’s a simple one: just put this in the <head> section of the theme and it’s all good.

<meta name=”referrercontent=”always” />

You can see the effects below: