So I'm enjoying my Schwalbe Marathon Winters, but I've lost four or five studs from my front tire, three of them in a row. When I emailed the company, asking for some studs that I could pop back in, I got a prompt reply saying that this was normal and that this would not affect the performance of the tire, so basically "tough luck". This is the first year that I've used these tires, and if I knew that this was a possibility, I probably would have bought them anyway, but I'm still bummed. Anyone else out there have this issue?