Updating the app gives you the following:
• Ability to move your own video preview during a video call.
• Improvements to the UI – specifically the contact list and chat input.
• User is logged back into Skype if the app shuts down while running in the background.
• Improved accessibility.
• General bug fixes.
Please also note that our iPhone and iPad apps will now only support iOS 4.3 and above.
We recommend that everyone upgrade to the newly released Skype for iPad and Skype for iPhone apps from the Apple App Store. We are always interested in hearing your feedback, so please report any issues to our Skype Support Network or on our public issue tracker.