Have you logged on to Twitter.com today? If so, you were probably greeted with a much whiter background than you remember setting.
That's because Twitter has decided to remove your custom backgrounds from your home page and notifications page.
Here's a statement the company:
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). You can find help center content about customizing your design and where it’s visible on Twitter here.
So you will see your backgrounds on some pages, but not the ones you visit the most.
As you can see, people aren't thrilled:
If you go to your settings and change your background to another color other than last-day-of-winter-thigh white, it'll work. You can turn your home page background back to what it was (custom of solid color). But navigate away from the site and you'll see white when you return.
Maybe Twitter just thinks your custom backgrounds are ugly. To be fair, they probably were. Maybe it'll change its mind and bring back custom backgrounds eventually. Maybe Twitter is looking for a clean slate to place ads.
Considering Twitter's recent money struggles, I'd go with the latter.