I was honestly trying to think of how an X11 bug could affect images and links in tweets until I opened the link and remembered that rebranding exercise.
On Linux, saying "X11" is like calling it by its full first name, and since we're long-time buddies, we're on a first-name basis and just call it by its short nickname X. At a formal dress party, we'll call it the X Window System, and if we were introducing it to royalty, we'd say X Window System, Protocol 11, Revision 6.
X
X Window System
X Version 11
X Window System, Version 11
X11
”— <https://www.x.org/releases/current/doc/man/man7/X.7.xhtml>
Apparently I read the sounds, not the words.
XXXX