"This isn't a bug at all. Not every other Tetris implementation gives bonus
points for dropping tiles early - the early Tetris games (including the GameBoy
version IIRC) don't have this.
Giving bonus points for getting a Tetris (4 lines at once) is however,
absolutely standard behaviour for the game."
Comment in the upstream tracker:
"This isn't a bug at all. Not every other Tetris implementation gives bonus
points for dropping tiles early - the early Tetris games (including the GameBoy
version IIRC) don't have this.
Giving bonus points for getting a Tetris (4 lines at once) is however,
absolutely standard behaviour for the game."