The colors of the board squares were fixed. A bug
that allowed castling when it shouldn't have been
legal was fixed. Proper Linux install scripts were
added.
Major feature enhancements include a completely new code base, a menu system to replace the console, a new pawn promotion interface, variable AI difficulty, a new loading screen, shadows and other graphical tweaks, full rotation of the camera, history arrows displaying the previous move, and MD3 (Quake 3) model support.