I think that my having missed the Kate episode is the problem. I didn't see her as particularly willful or distrusting (moreso than anyone on the island) ... just, not so much wanting to what he wanted her to do. So, I would get that he'd be annoyed by that maybe, but I didn't see putting it off on her as warranted. The moment just played weirdly to me.

Hurley pissed me off this ep. First, still calling Jin "the Chinese guy" and then playing his discman while Charlie was playing guitar. Rude! I wonder when will get his story.

On rewatch, Charlie is not performing with his guitar, he's sort of touching it and tuning it, and strumming it and generally cooing over it. It's not like Hurley is ignoring Charlie serenading the gathering throng.

I get immeasurably annoyed with Hurley every time he puts on the fucking discman. Don't they need batteries for the transceiver?

Doofus, get your head out of your ass and start thinking about resources.

Jack is talking about beach versus cave, and wondering about her reticence. I think maybe Kate is thinking in terms of boy versus girl issues, and wondering about his obliviousness.

Oh, interesting (I hit post before I read this). So, basically, she's pissed at him, and he doesn't get why? Hmm. Interesting.

No, I don't think he meant wilfull. I think he digs a strong Kate. (I know I do...heh)

Jen, Do you have broadband? I suggest downloading her ep... heh

I'd suggest downloading any unseen ep, tho.

I get immeasurably annoyed with Hurley every time he puts on the fucking discman. Don't they need batteries for the transceiver?

You really think the transceiver runs on AAs? Back off my Hurley, man! You're allowed to knock him for the second "Chinese" comment, though.

Sometimes, a guy just needs some music.

Do you have broadband? I suggest downloading her ep

I do, and I've even sort of looked into it for other shows, but I haven't yet downloaded anything. Maybe I will just go ahead and bite the bullet for this one. I'm just a stranger in a strange land technology wise sometimes. And I have strange irrational fears that I'll break my computer. It's kind of sad, really.

So, basically, she's pissed at him, and he doesn't get why?

Right. I didn't get it either, at first. Thus the "petulant" thing. I'm going with she is feeling scorned on the animal-magnetism frontier, and he is stumbling around in the male fog of "What do we do about all these responsibilities?"

From the recap, I particularly loved:

I think Jack needs to examine his cave fixation from a Freudian standpoint. And then get laid.

That's so funny. 'Cause I was pretty much in a fog of my own (but neither of theirs). Mine was, "Jack, what's your problem? She just doesn't want to do what you want her to. Deal. Don't assume shes some way because of that." But, yeah, in the moment she had pretty much gone from friendly to shut down. I can see the interpretation.

Though, I would like to think that she decided to stay on the beach for reasons other than just being annoyed. So I shall.

ETA

I liked this bit from the recap, too:

So Sayid gets the marshal's handcuffs and cuffs Jin to the plane wreckage and decides to let him stew in the sun until somebody cracks and tells them what happened. This is an excellent plan, except for the fact that Mercutio has no earthly idea, Sun and Jin don't speak English, and... they have no key to the handcuffs.