Yellow crab spider

I'm not sure, I don't know too much about crab spiders. I do know that their colors can be pretty variable. For example, compare these two pictures: http://www.marietta.edu/~biol/zoology/so... and http://www.marietta.edu/~biol/zoology/so.... Those are the same species.

@Latimeria, you were right: he was screaming "CRAB SPIDER". Can you tell me, though, do they lose the brown markings as they mature or is that just a variant?

Thanks for the tip, Latimeria. I hadn't thought of the lynx spider, eventhough I had spotted one in the same area (http://www.projectnoah.org/spottings/658...), because the abdomen shape is different. But I suppose it's worth another look.

That last picture screams crab spider to me. Have you looked at lynx spiders? I know pretty much nothing about lynx spiders right now, but when I've glanced at pictures of them before they seemed similar to crab spiders.

Thank you. Any ideas what it may be? I can't find it exactly as a crab spider and it did a lot of posturing like a jumping spider. So I'm confused.

Pretty spider.