I'm a big fan of Infinite-Scroll on my blog, http://Lee.org. I ran into some problems with the latest version.
I installed the new Infinite Scroll 2.0b2.110629. It worked ok except it has a conflict with WP FancyZoom. Here is how to reproduce that problem on Chrome
* Install WP FancyZoom 1.2 and Infinite Scroll 2.0b2.110629
* View the blog homepage
* Click on an image and note that FancyZoom opens the image correctly
* Scroll down to page 2
* Click on an image and note that FancyZoom doesn't open the image, instead it is opened directly by the browser.
* Click "Back" and :-(, you are put back at the very top of the blog homepage
--------------------------------------------------
I tried to rollback to version 1.5.100504 of Infinite Scroll but it isn't available in the Plugin Directory :-(
(http://wordpress.org/extend/plugins/infinite-scroll/). Luckily I found it in my backups.