During the last night the hacker MuscleNerd stated that iOS 7.0.3 it should be avoided, at least for now, by those who intend to do it jailbreak in the future for iOS 7. After a few hours of checking the new version of iOS, the hacker stated that the users of the solutions jailbreak they can update quietly if they already have a version iOS 7 installed. The hacker referred to a bug available in LockScreen that Apple would have solved iOS 7.0.3, so hackers probably have jailbreak exploits that will affect that part of the operating system.
Unfortunately, once you've updated to iOS 7, you can no longer downgrade to any other version of iOS, unless you have an iPhone 4 and SHSH-usi saved with iFaith.
