This happens to me about twice a week:
1) Get into a large fight
2) Get CC spammed and survive
3) Get stuck moving one-quarter speed afterwards, even after combat ends.
And when I say stuck I mean stuuuuuuuck. It's not the "RP walk", if I turn that on I actually walk even slower. If I get on my 60/60 horse, cast rapids and sprint I'm still going the same slower than walking speed.
Trying to /reloadui doesn't help. The only thing that fixes it is logging out and back in which sucks when your Alliance is capped in Cyrodiil. You have to use the Alt-F4 trick and hope the server lets you log back in (which sometimes fails)
Has anyone else had this problem and found a better work around then logging out or quitting/restarting?