XF 1.2 Not able to type any message into body of post.

It's been brought to my attention that all of our internet explorer users cannot post or reply in any of our subforums. I've recreated the problem myself and found that in the create thread page you can add a title, but cannot add any messages to the body.

Has anyone else seen this and if so, is there something going on with IE?

Thank you!
Question 1: Am I running 1.2.4?
Answer: I wasn't, and have since updated.
Updated: Problem fixed. Internet explorer 11.0.2 was being used. After xenforo update all the functions are now working normally.