@leocg Good guess. I tested the new themes when they came out, the moving ones, but returned to my old static one afterwards. The naming was gone.
Surprise surprise: this morning after reboot everything is again as it was and should be But thanks for the hint anyway: so now I know where to look if it happens again.

I am posting in the "Opera for Windows" forum, I did not know that there are several Operas on PCs... I had to look it up: Opera One .

Since last Opera Update the names under the Quickstart Icons are invisible until I hover over the icon. Thats extremely annoying. Can I change this back?