I havent heard about creak hinge yet .....
(Birdys however had a recall about their handlebar hinge a couple years back as far as I know ......)
I think that was the reason they widraw from the US market, albeit they stated on their website that they do not agree to the political actions of the Americans and thats why they refused to do business with the US )

I did hear about noises on the Dahon rebar frame, that is not the hinge though and poses no problem.

The reason I posted about the tires is simple. Not eveybody goes through the extreme of buying a new bike .... and these folks who have a MU SL might very well be having the same sentiments. I did know that you had bought a birdy already. So I couldnt really help you anymore ...lol

Thor