knob labels blurry after knob is used

[abulka]

Creating a knob with a label var k7 = new Interface.Knob({ bounds: [.3,0,.1], value: .1, usesRotation:false, centerZero: false, label:'dial2'}); looks ok initially, but the label goes blurry after moving the dial. Happens on both retina and non retina. Perhaps the 'label' parameter for a knob is not officially supported? Using chrome on mac.