Audioguru is correct, you should use a 120 (or 121) ohm resistor with any 337 type regulator. The Fairchild data sheet doesn't mention it, but that's because it's a copy of the National Semiconductor LM337 and generic parts don't often have very thorough data sheets. You have to look at the original mfg for a thorough data sheet, which will most definitely mention using a 120ohm resistor.
The Fairchild data sheet does give all its specifications at Iout >10ma. This is a roundabout way of saying you need to use a ~120 ohm resistor on the ADJ terminal because the internal voltage reference is ~1.25V or so.