I'm using a Featured Image from the featured image dialog box for the post. I want the images to show up on archive pages as 150X150 cropped images. Under Post Thumbnails in Atahualpa options I chose crop image and set it dimensions to 150 X 150. I used your recommended <div> coding to place the image:
<img POST THUMBNAIL HERE class='wp-post-image' />
<p>Post Excerpt starts here...</p>
All the images are cropping at 150X43. I cannot figure out why they are cropping at a height of 43. What am I missing. Here's an example of an archive page with images cropped at that ratio; http://www.scidangelsforlife.com/category/past_events/
Thanks for your help.