The friend icon on the top right disappeared. (None of my friends were online at the time I took the screenshot, but the icon used to show up as gray when no friends were online.)
My supporter status no longer shows up in the game panel. (I still see the golden name when I click my name or go to my profile page.)
These are bugs that will most likely be fixed soon, I think
For now refreshing the page could bring your golden name back.
My online friends indicator has never disappeared.