[Burrfan]

Hey everyone,
I just picked up a 1/4 keg of Widmer Hefeweizen with a tag date stamped Feb. 20 2008, tapped it and found it to be cloudy and brown, looking like carbonated brown water. From what i remember Hefeweizen is supposed to carry a honey color and this just looks brown and dirty. Could I be a victim of a bad keg? Or maybe foul or old beer? It tastes ok, not what i remember hefeweizen tasting like, and is sharp on the tongue, again not what i remember hefeweizen tasting like. I checked the kegerator and its at 38 degrees with a 10.5 psi, which seems right. Any suggestions? Thanks for your help it is gladly appreciated.