You can add me to this list a well.
I got upgraded with new Hub 5 on 1st Nov and saw answer machine light flashing and when I looked at calls list I had 9 No Numbers and just like everyone here on this subject getting this and some days it's double figures. This has happened since I got the Hub 5 and No, I will not want to change my landline number. My phone is BT digital cordless.
Like everyone who is effected by this, I would also like to be kept up to date with this issue and see what will the outcome be, if there'll be one.