I really hate the calendar app now, but my number one complaint about the new iOS 7 is the wallpaper. I hate the way it moves, and how it stretches your background picture so it's distorted, and cuts off the edges of the picture. Well, just figured out how to fix that! The Parallas Effect is what causes the motion, and you can diable it. Here's how:
There are a bunch of other complaints about the software, and a few solutions.
Read about complaints --> YAHOO! NEWS