[funkah]

Pretty cool until you click a link in the list, go back, and make a sad face when you realize the list has reverted to the first 20 items or whatever. Then you have to scroll, wait, scroll, wait, scroll to get back to where you were.

[JamesLeonis]

Tumblr implemented endless pagination with exactly this problem. This came up when you tried to reblog/reply to a post or view "read more" content and forgot to open another tab. They have since implemented a regular pagination system that fixes the back button problem.