There is indeed a risk of hyperinflation, as a consequence of QE. The colloquial slang for QE, "printing money", is somewhat misleading though. The extra money created is used by the Central Bank to purchase gilts on a short term basis, affecting the market, and allowing money to flow. They also monitor interest and inflation rates very closely. So far, I dont think there have been any indicators that Hyperinflation is going to kick in, in the UK at least.
A good wiki article on QE, if you are interested ;
http://en.wikipedia.o...i/Quantitative_easing