Hi Eric,
I’ve looked at it and asked for a colleague to help, and we can’t pin down the problem. We suspect that the theme is somehow increasing the size of the containing div around the image, thus making them look stretched out because the images have an inline style of 100% width and height; what I can’t tell you is why this is happening, but it must be in your theme since I was able to reproduce by switching back and forth from your theme to the default theme. At this point, I suggest you ask the theme author if they have any ideas, and let me know what he says.