Interesting thread. We have a McClaren Twin Techno, and my DS's finger is just recovering from having been trapped in it.
I agree completely that it doesn't seem possible for a finger to get trapped if you are using common sense, but it happened to my very sensible DH (he's a German engineer, c'mon, you have to believe me that he is VERY sensible!). I wasn't there when it happened, but it seems that the twins were grumpy, crying, climbing into the pram whilst DH was trying to unfold it. He had just pushed the last part into place (children still crying etc) when he realised that DS was now crying because his finger was trapped.
We were shocked to read the article in the news about the recall, because we realised that DS had a very lucky escape, and seemingly could have actually lost his finger end. As it is, he just lost the finger nail (the whole nail fell off), and that is now growing back.
So, maybe my DH was on that occasion more careless than usual, and it could never happen to the millions of other parents who are always much more careful and perfect than him, and would never let their children within 3m of an unfolding pram. Or he's normal, and it could happen.
A friend of mine had a different brand of pram where the child's seat could change direction. Child was screaming so she stopped, changed the direction by moving the handlebar, and trapped her child's arm in the process. Since her child was already screaming anyway, and since the pram was new so she wasn't used to the mechanism, she didn't immediately notice the problem.
I'm not sure it's possible to make a completely safe pram, rather better to be aware that it's easier than you expect to get limbs trapped!