Of course the first thing I did when I got twitter to work in Windows Phone 7 Mango Beta 7712 was to try and link it with my contacts. To my surprise I was unable to do this, but thought this may just be by design.
It turns out in fact this is a bug, which occurs when upgrading from bate 7601 to 7712, and it seems the only cure is either a hard reset or reverting back to NoDo using your saved back-up (you do have that, don’t you?) and then upgrading directly back to 7712.
Neither sounds terribly appealing, as in both cases data will be lost, including text messages.
The last choice is of course just to wait for the official update (although you will still have to revert to your NoDo back-up in the end).
Have any of our readers run into this issue, and which option will you chose? Let us know below.