The user is scrolling one long page, not navigating between 'pages'. Having entries inserted into the history while scrolling seems very counter-intuitive to me.

mh yes that makes sense.

i think the reason why i did this, was because initially the preview und market links didn't open in a new window. but you're right, if the user is staying on one page, he doesnt need a 'back' functionality.

thanks for the feedback, i already changed it, going to push it later...