I’ve followed the steps of the installer from Ubuntu (osmcinstaller) on a Pi2. After inserting the sd card and powering on the Pi2, the large multicolored square appears and it gets stuck there. I’ve tried the 2015.09-2 & 2015.08-1 images with the same result.
To make sure I also downloaded the last raspbmc build and the install starts just fine with it, so it doesn’t look like a power or sd card problem. Furthermore, this Pi ran rasbmc just fine for over a year.
Not to mention the Pi 2 came out in Februrary so “ran rasbmc just fine for over a year” would not have been possible even if Raspbmc did work on a Pi 2…