Lipstick on a pig nonsense?

Okay, let's clear this up... Why does this comment get attention and unwanted air time when Barack Obama says it, but when John McCain says it and directs it towards Hilary and her health care plan, it doesn't even cause a stir? Truthfully, Obama stated this in reference to McCain's revision of his campaign title. It was once "Experience", but he soon revised it to "Change". Hence, Obama's statement. It wasn't in any way intended to aim at Sarah Palin. Why won't the republicans drop this nonsense and talk about the issues!?