Just been fiddling with my car dock, and I agree - the top of it (where the clip is) is really poorly made... way too thin and you can tell it's going to be the weak point of the whole kit.

What I have noticed is that if you put the phone in at the top first (where the clip is) then clip it back onto the contacts, it doesn't put as much stress on the clip at the top. You can also click it out easier by putting your fingers on the rear of the lower section of the dock, and pivoting the phone out the same way.

If mine fails, I guess I'm pretty much screwed unless HTC UK will honour the warranty... lets not think about that for now though, it was a 55 item ($55 + $29 for DHL) so I won't be happy at all if it fails on me.