Oh right, I think I remember now. This is a problem with my tutorial image not being true to the game’s real state. I’d edited the game to remove the clone frames.
In the actual release of AB they doubled up the animations for hover over and clicking. If you check one of the g00’s in g00lib you’ll see they have 8 frames instead of 4.
It goes like this: Image 1 > Image 1 > Image 2 > Image 2. They do this with most buttons that have a hover-over.
In AB’s case, since the files were part of a group project, I just doubled the frames in Photoshop so anyone could use them. For solo projects I’ve just edited out the redundant frames in the code. There’s probably a way to clone frames with the text file too, but I’d have to check g00pack’s documentation…
So basically the reason you are getting blank frames is because you’re missing half the frames.