My game's UI runs perfectly fine on iPad 2 and above. But when tested on iPad 1st gen, my custom made Atlas (using Atlas make) become a bunch of black boxes:




As you can see in some of the images, the original UI provided by the NGUI package works perfectly fine, no black boxes.
I've tried changing the image compression format to be the same as the original one:
Texture Type: Texture
Wrap Mode: Clamp
Filter Mode: Trilinear
Aniso Level: 4
Max Size: 1024
Format: Truecolor
Still, the same problem still occur~
