Gradient on iPhone Shows Streaks

So I have been tinkering in Photoshop, having made myself a simple background for my game, nice gradient, can't beat a gradient.
Anyway on my computer monitor it seems lovely, however on my device screen it shows streaks/slices/lines whatever you want to call them.
Anyone else experienced this? Any ideas of how to remove this?
Thanks as always.


Thanks as always.

Comments
Cheers,
QS
http://gamesalad.com/forums/topic.php?id=4327#post-26117