Nope.
What I'm seeing right now in multiple tabs- all in different forums of ENWorld- is the icon for "Hot Thread With No New Posts" all over the background of the site. As in, what I'd normally see as black is now a gridwork of brown, burning D20s on a greyish background.
I
It's almost like a geeky houndstooth pattern.
I didn't change any settings. I posted in a thread and used the toolbar to go back to the forum it was in, and voila! And it has been that way in every bit of ENWorld I've visited since then. I just assumed someone was experimenting with the visual style settings again.
When I tried the other style settings and then went back to my preferred "black", it went back to the wall 'o' brown burning dice.