I'm using version 1.1.1 of GeekLad's Free WordPress Store for Amazon Associates plugin under WP 3.4.2.
I have JetPack installed. The latest JetPack updates, both versions 2.0 and 2.0.2, are wreaking havoc on the plugin's layout and functionality.
Books are displayed as an unordered list instead of a table, and the cart just displays as a constantly spinning animated .gif that says "loading."
I had to revert back to JetPack 1.9.2 to make things work again. :-(