Can you do a get status from the master branch?
The only think I can think of is there's an edge case in the javascript. I'll update the code tonight to display any errors.
{"brewday":{"mashStart":"2014-01-28 15:47:11 -0500"},"kettle":{"elapsed":1390942043612,"scale":"F","temp":65.975},"mlt":{"elapsed":1390942043858,"scale":"F","cycle":0.0,"d":0.0,"duty":100.0,"status":"off","p":40.0,"temp":67.325,"gpio":"GPIO11","setpoint":175.0,"mode":"off","i":0.0},"fermentation temp outside":{"elapsed":1390942042908,"scale":"F","temp":65.1866},"pumps":{"pump1":false,"pump2":false},"fermentation water temp":{"elapsed":1390942043362,"scale":"F","temp":66.3116},"herms":{"elapsed":1390942043175,"scale":"F","cycle":0.0,"d":0.0,"duty":100.0,"status":"off","p":40.0,"temp":66.42500000000001,"gpio":"GPIO10","setpoint":175.0,"mode":"off","i":0.0}}