Yes I have seen other users post on these forums in regards to their devices freezing. You could try a reset:
- hold the home button and sleep/wake button down at the same time
- the iPad will power off (keep holding) but as soon as you see the Apple logo appear release both buttons
If that does not resolve the issue then connect the iPad to a computer with iTunes. First back it up to save the data on it then restore it to factory settings.