I suspect the verb 'to dack' is an Australianism.  Do other people call trousers dacks?  I'd support it being included as a rare word.  Dacks too, if not already allowed (same deal as for pants and tongs - a seeming plural that isn't.)

I've heard it before, but it's certainly less common than slunk, or even slank.  I was surprised it was common, but I got it, so I'm not complaining!

I've never heard of it either.

OK it's a deal, MK.  Casein should definitely be common.

I was about to respond to Cleverjen's post by suggesting that it should be Alan's call, since he is Chi's creator and owner.  So I'm glad that Alan has commented.  I'm very glad to hear that there are no plans for advertising on the Chi site - we're bombarded with online advertising almost everywhere else.  Mind you, I think Alan is entitled to make some money if only to offset the costs of keeping the site running and the investment of time and energy.  Would it work as an app that people could buy for their mobile devices? 

Yep, you were right MK.  114 rosettes by my reckoning - second highest ever.

I agree with the bit about the cheesemakers being blessed.    As to casein, I think it's marginal.  I wouldn't object to it being made common, largely because it's a word I always see, so it would help me get a rosette.  It would be interesting to see how many players got it in the recent game and in previous ones.  If a majority of players got it, I think it strengthens the case for it to made common.