they're rock solid man!! i'm on my 3rd pair now, and never had any probs (2x614 and 1x816). I've had some bad landings, and lately I had to change the heel-piece thingy of my Lange FR120 who actually had split horizontaly in two... The guy over at Surefoot said it was due to heavy switch landings. But the deadbolt; INTACT! not a singel sign of weakness so far, from my experience!
and, I don't think they just change the colors from year to year. If they find any kind of weakness to it, they improve it. I know they've done something with the healpiece to make it stronger, some additional plate or making the plate stronger..
It's a binding made for newschool skiing, and constantly tested by some of the sickest skiers in the world! If it wouldn't hold up, 4FRNT wouldn't sell it, it's as simple as that! ;)
SIGNATURES BORES ME!