iPad Specular Artifacts

Hi all,

I'm working on an educational game/simulation for the iPad, and I'm getting some weird artifacts whenever I try to use specular lighting. I'm using the mobile/bumped specular shader. I've attached a screenshot below:

My first thought was that it was some sort of compression artifact, but uncompressing the normal map did not fix it. I've also tried changing the image size, with no effect. The texture works fine in the editor and on a computer version of the app using the non-mobile bumped specular shader.

Forum thread: http://forum.unity3d.com/threads/85336-iPad-Specular-Artifacts

Any help in solving this issue would be greatly appreciated. Thanks.