Facebook has announced the changes the way the news feed displays similar updates from friends. With the update, "Facebook will now, essentially group posts together in the news feed if they are on the same topic. This will operate very similarly to the grouping that occurs when multiple friends share the same link."
In the picture example, only one of the updates features a link to the Harry Potter page while the others simply mention "Harry Potter flick" and "Harry Potter."
Per official statement from Facebook:
You may notice some of your News Feed stories are now grouped together by topic. We want to show you the most relevant and interesting information, and this test is designed to show you trends among what your friends are saying.
Many of the initial comments were negative initially, something not out of the ordinary for Facebook changes.