I wrote to Rome via their online support thingie about a week ago, but I still haven't received any answer.
I tried making the strap a little longer or shorter, but I didn't notice any difference. I'm hitting the slope on Friday and will try to tie it over the toes.
I don't really want to change the boots as I find them very responsive and comfortable. As a last resort, I think I'm gonna use my other bindings the remaining of the season and buy the Cartel 2013 in the end of the season, when the discounts kick in.