(In reply to acutiator from comment #15)
> Based on what you said, I would think that it should be possible to detect
> when an invalid pre-multiplied alpha bitmap is in use. Is that true in all
> circumstances or is there more nuance to that? If it is true, I would think
> it'd be worth correcting for this error on the library side, though the
> problem is actually in the games.

How would the xserver know what the game intends in the cursor image?