Is anyone else's wifi not working properly after the IOS7 update?

I had really good wifi signal before I did the update but now it is always dropping and tends to cut out for ages. It works for our main computer but since the update my iphone doesn't work properly.
Any reasons why?

Mine dipped a bit for the first few days and when I was not connected to wifi I would get E signal (Edge, it's rubbish) instead of 3G but it's picked up and both signals are back strong again now, i have no idea why it happened or how it resolved itself though, i did disconnect it and reconnect a few times so maybe that helped with the wifi side of things.