As you can see in this image, the player's shadow is bizarre-looking. This is due to Character Effects using the spritesheet without breaking it up as Multi-Frames does, leading to 'multiple' player shadows appearing.
The other incompatibility, which is not so simple, is that, if the player attempts to walk diagonally while Character Effects is installed, the game will crash.
Included with this post is my current sprite sheet. Might be useful. It'll look odd in-game, because it's normally used with Victor's Character Control, but it shouldn't be necessary here. All of Victor's scripts, by the way, require this script to function.
Any help, as always, is appreciated.