wordpress media uploader

The change to the new media uploader has me baffled. I have a bunch of images uploaded, and I am trying to use the Hybrid Path theme (sorry, I found them before I found y’all.) I can’t seem to change image sizes to make them work in my theme slider. I set featured images, I make them 150 px tall, and the settings I prescribe don’t seem to stick. see my test site, heartofarlington.info

I’m just stuck. One of the images works, the others don’t, and I’m convinced I’m doing them the same way–unless I’m not. These are ALL images out of my media library, and these are new posts.

If somebody could tell me, do A, B, C, D to make the images do these things, I’d be a happy man: 1) Thumbnails @ 150×150; 2)Featured images in post (which shows up in my Slider) @ 200 px height, width tbd.

Let’s start there.