Also suffering
This is a bit of a disaster... has blown away my excitement with the new phone. I took a 30 min call today and ended up twice hanging up, putting on mute twice, putting on hold once, and activating the keypad then pushing random numbers on another occasion. I have *never* managed to get this to happen with my old 3G, even if trying.
Perhaps I'll be able to find a new way of holding it that avoids the problem, but I was fairly consciously holding it to my ear after the first two or three problems.
I wondered if it was faulty in some way, but if others are seeing it that's unlikely (unless a batch are faulty). Instead it's probably just a poor design