OpenGLES error 0x0502

Hi,
this is related to sepia and full screen image effects.
I’m getting this error in the console:
OpenGLES error 0x0502 in /Developer/Unity/IOSBuild/Gowa/Gowa/Classes/iPhone_GlesSupport.cpp:290

This happens ONLY when i have two cameras active (even if the second one is rendering to a texture and that texture is not present in the scene.

Do you know what it can be?
More info here:
http://forum.unity3d.com/threads/124674-3.5-BUG!-Image-effects-for-mobile

Thanks

Hi Unity Developers,
one could think you should be interested in knowing more about bugs in the product, can you please read this post?
Thanks