Thanks for the info Arima <img src="smileys/smiley1.gif" border="0" align="middle" />
I did try to turn off the clear background after reading your post but without success (using a 16x720 tiledbackground).
I read the link you sent me, in my case I only have this gradient back ground that will cover the entire screen, all my others layers uses smaller sprites and tilebackgrounds objects with a layer transparency active.
My biggest sprite is around 213x180 is that too big?
I will try with the "Clear background" at "off" with a single sprite stretch to 960x720 this in a couple of hours and will let you know if that worked better.
Thanks again it really appreciate!