My profile name and icon are fine on a half-dozen sites in the SE network, but broken on Coffee.SE. There, the user name appears as a25bedc5-3d09-41b8-82fb-ea6c353d75ae. (True Names?)
This bug is new. That is, the profile name and picture were fine for 6 months, and only broken recently.
That should rule out the problem being the same bug as Why is my profile messed up on a single site and how can I revert it? although the visible symptom looks the same.
I fixed it via manual profile edit.