Nope, i asked before on the other page, if you meant the catch up bug or not, and since people have been calling it the run bug i assumed you were talking about he same thing.
I not sure of this 'run bug' the way you describe it, maybe just your not used to how sensitive the left stick is. I mean, you can stop and change direction but very, Very lightly touching or brushing it, it's very very sensitive so a very slight input change will stop your player. Maybe it's just that or could you provide a video if it's something more malicious
Klash to be fair to him, others have also reported this issue with the xbox360 from the demos, where the controller has got issues.