Patrick Collison » blog » Dynamic Default.png files on the iPhoneJohn Gruber writes: I’ve seen third-party iPhone developers complaining that this trick is only available to Apple; they want to use it too. The technical reason why they can’t is that because application bundles are cryptographically signed, you can’t modify the contents of the application bundle (by, in this case, changing the default.png resource file) without breaking the digital signature. Ap
