1. Safari on iPad Air, when you tap on address bar, the keyboard stutters while coming up. But if you disable transparency from accessibility settings, the lag disappears.
2. Safari loads pages slower and slower as time passes, to the point it simply refuses to load any pages completely. Solution is to disable and enable wifi or disable spotlight search in Safari settings.
3. Safari reloads tabs after switching from another app using multitasking menu. Solution? There is no solution for this problem. Either Apple optimize Safari further or increase RAM in future models to 2 GB or more. As the websites get heavier and heavier, this tab reloading problem is going to worsen further.
4. Safari crashes randomly. Again, poorly optimized Safari and lack of RAM (! GB only) is the culprit.
5. New weather app on iPhones is laggy when tapping on different cities.
6. Random crash logs and Thermal not updating, stacks+backboardd logs in diagnostic data. (Apple will fix this)
7. Music app is laggy while scrolling albums on iPhone 5c and 5.