Ok. While I have the attention of both The V-Man and the Brain:
I sent this skin to someone to test. I know she always has a lot of content on her start panel and I wanted to see how the gradient looked streached.
It seemed very stripey 

I have tried any number of streaching/tiling margin combos whithout success.
Have I drawn the image too small so that it streaches badly when applied (238x317) or is there some magic setting combo that I haven't tried?