Backgrounds have been removed from home pages and profile pages, and now only appear on individual tweets, list pages and collections pages.
In place of those backgrounds that users have worked so hard to make their own, you now see a neutral grey screen.
The background removal happened without an announcement from Twitter, and many users thought it was a mistake. But in a statement to The Verge, a Twitter spokesperson confirmed the change:
We’re removing background images from the home and notifications timelines on web for all users. Now, background images are only available where logged-in users will see them publicly (tweet pages, list pages, and collections pages).
Many users responded with criticism:
Aaaand there goes the white Twitter background. What a pointless, dumb, user-annoying change. Or bug. #Twitterwhite
— Chris Taylor (@FutureBoy) July 20, 2015