I can't believe all the negative comments on here. If you have enough tabs open that infinite scrolling starts to bog down your browser, you should probably find a girlfriend/boyfriend and get out of your mom's basement or replace your computer with one made after 2003. Infinite scrolling, especially as shown here, is fantastic because it doesn't require endless hitting of the back button to get to the original post. The only time I've had a problem with infinite scrolling is for facebook friend purging and even then, who cares!?! If you don't like sites that use infinite scrolling, don't use those sites. This hybrid pagination/infinite scroll option looked awesome to me.