I was just running around through Shivering Isles and found an Elytra trying to attack me. I cast a shock damage spell at it... or tried and nothing happened. I ended up dying cause I wasn't able to cast spells. Then all of a sudden my character was lying there and all of the spells I tried to cast were cast from my dead body. After that I haven't been able to cast any spells at all. I didn't change anything. I didn't load a new game or remove plugins or anything.... It just stopped working. And its not my keyboard or something. Even after I changed the controls to have Cast be a different key it still wouldn't cast.

Anyone?

Reload a previous save, and see if the problem repeats itself.