Bug in 2.1.1: I flew up the shaft above the special stage gem in GFZ1 as Tails, as my character started to fall back down everything went distorted and then the game crashed. Windows 7 x64, Phenom II quad @ 3.4GHz, nVidia 9500, 4GB DDR3 1600 RAM. Not sure if this was a one time thing or not...