[ Sorry, I do not have a better starting point for this. ] After updating Latex, I got the message:
Creating LaTeX preview images failed (exit code 252). Please see *Org Preview LaTeX Output* for details which corresponds to RUNNING: latex -interaction nonstopmode -output-directory /tmp/ /home/viz/doc/uni/notes/org-tex-KByBIT.tex This is pdfTeX, Version 3.141592653-2.6-1.40.26 (TeX Live 2025/dev/Debian) (preloaded format=/home/viz/.cache/org-persist/70/4b50e3-c1f1-4ed9-be3a-acf259bf6d3d-54035ced5d211d19e0eec7be4671c146) restricted \write18 enabled. ---! /home/viz/.cache/org-persist/70/4b50e3-c1f1-4ed9-be3a-acf259bf6d3d-54035ced5d211d19e0eec7be4671c146.fmt made by different executable version, strings are different (Fatal format file error; I'm stymied) Would it be possible to give a more informative message for this case? It is not a showstopper since the error message by pdfTeX is informative enough but something more informative from Org would be nice regardless.