Reading all the posts on this subject made me rather anxious. My M9 had been diagnosed with the sensor problem when I tried to get the sensor cleaned, so I feared the worst. Then I saw the announcement a few days ago and rang Leica UK customer care. I was walked through my options and told about the upgrade policy.
Long story short, less than 24 hrs later I was walking out of the Leica Mayfair store with a new Monochrom. The trade in offer on my M9 meant I had lost less than £300 on my used cost, purchased over three years ago.
The cost of ownership was approx £1.50 a week... for so much joy.
Yes I know I am lucky to be able to trade up, but top marks to Leica UK for their faultless treatment of my problem.
It's my first forum post, so go easy on me.