I have a jailbroken 2g iPod touch on os4 and whenever I put a theme on, the dock moves up and I have far less space on the springboard. It doesn't sound like much but, seriously, it's really annoying. Anyone got any fixes??
You have to edit the dimensions of SBDockBG.png. Take a look at one from 3.1.x versus IOS4 and you will see what I mean. I can upload one if you want later.