Stay safe, and keep racing.
The update addresses a buffer overflow vulnerability within the online code to prevent potential security risks during internet play. General Stability:
Master anti-gravity racing, where you can drive on walls and ceilings to find the fastest shortcuts [1]. Battle Mode Redefined:
, version 3.0.3 was a much smaller "surprise" patch released by Nintendo to maintain the game's long-term health. The Story of Version 3.0.3