You'll need to take a screenshot of the normal header background, and save a 1px wide slice of it as 'my_head_bg.png' and add it to the project. This way, it'll look just exactly normal.
Thanks for reading! And if you want to get in touch, I'd love to hear from you: chris.hulbert at gmail.
(Comp Sci, Hons - UTS)
iOS Developer in Sydney.
I have worked at places such as Google, Cochlear, News Corp, Fox Sports, NineMSN, FetchTV, Woolworths, and Westpac, among others. If you're looking for a good iOS developer, drop me a line!