According to the laws of chess, when a threefold repetition is made, either the player can claim the draw on making the move, or the opponent can immediately claim the draw.
 
However, I can't see how to do either. In one of my corr games, today I made the same position for the third time. I ticked 'Offer draw' thinking maybe this is the way to claim the draw. But it hasn't had this effect, and neither has the game been automatically ended as a draw. My opponent has now replied to this move, and this move has likewise made the same position for the third time. But I can't see any option to claim the draw.
 
Help me please!

You're a founding member, who can answer this? I't like to know too.

I thought an automatic "Accept Draw? showed up......?

Yes, I remember the old Caissa doing something like this (probably still does, for all I know). But this one, as I understand it, was built pretty much from scratch, rather than being based on the old site, and as such functions in a totally different way and has a totally different set of bugs.