What firmware are you on? This is from the developer:
===TO EVERYONE ON FIRMWARES LOWER THAN 4.x.x===
I know you have this issue of 88:88 appearing behind the background, and I've had literally 50 people a day ask me this, The problem lies in the way iOS4 handles backgrounds ever since Apple added the customizable wallpaper feature. Since I've made my theme to work with iOS4 and not 3.x.x, I will not be releasing a fix for this problem in my theme.
BUT! There IS a simple fix! All you have to do is go into the theme folder and open up style.css, then find this code:
and change it to:
Typophone 4 by ~Angelman8 on deviantART