to be honest, I am not sure as I have not grown them, but I lived in a cabbage/cauliflower growing region, and the smell from the fields, got progressively stronger as the season grew warmer, and the individual smell when I brought them was stronger as well, a really strong cauliflower/rotting/musty smell? the cauli, tasted fine, maybe it is just before they bolt, the scent changes? who knows?
just done a google search, nothing except the cooking smell! so clearly my sense of smell has been killed off by living near the fields as I have never notice that, but could the heat of the day be sort of cooking it, all be slowly? just a thought, by way of conversation but it might spark discussion. good luck in the quest.

Thank you heather38,

Incidentally, I thought of heat as one of the issues and the google just pointed me to cabbage-smell during cooking. It has gotten a bit warmer lately and the days I harvested them were hot(relatively). Still have about 25 cauliflower plant left. I hope the rest don't suffer from the same issue. The taste is just amazing so I think its okay to eat them.

I chopped raw cauliflower up for my bun, it stank my flat