On a slightly different tack this discussion prompted me to look closely at the care instructions on the label on my Endura shorts.
It actually recommends that you should "Drip dry only out of direct sunlight", presumably because UV rays will make the fabric deteriorate quicker.
This prompts two questions:
1. Should this advice be followed for any cycle clothing made from artificial material
2. Doesn't riding the clothing in direct sunlight have the same affect?