I got on my horse and for some reason I cannot sprint. I thought it was my button so I got off and tried to sprint by myself, it worked. I haven't been able to sprint for over five hours, and counting! Just "jogging" with a horse doesn't cut it.

Any one else experiencing this glitch?

Yes I am as well actually. Bumped for support.

Strange, yet I haven't met this problem (lucky me!). That must be painful.