You should only use power of two textures, best if squared for greater compatibility.
Also, always specify "1" (Color) for the texture flag; i.e. LoadTexture("texture.png", 1).
These two are the most common problems with newest video drivers (however not so new by now), though the first one always was an issue on some cards, expecially ATI ones.
Also, always specify "1" (Color) for the texture flag; i.e. LoadTexture("texture.png", 1).
These two are the most common problems with newest video drivers (however not so new by now), though the first one always was an issue on some cards, expecially ATI ones.