(While I'm complaining, the links only go to the "flat" version of the thread, while I happen to prefer the version that shows one message at a time with a message-ID selector to switch messages.)
Then you're clicking the wrong link :) As long as you click the link for the message (first or last) you get the "regular" view. The "thread" link always goes to the same message as the "first" one, except the flat view. So you have a choice of both (and these links are both always visible, none of them is in the "collapsed" area which holds the attachments)