Ok, With a slight delay I got it all up and running again. The Racket update doesn't seem to spend a lot of care on updating. I ended up deleting basically every .zo file outside of my home dir, reinstalling 5.1 then rebuilding Fluxus. After that I needed to to the ldconfig thing because somehow the location of the 3m library had gone missing again.
This won't win any beauty awards, but it works. Is there some version-independent way for Fluxus to poll the system (through something like which or whereis) for the location of libracket3m[version].so ? This one seems to get lost during updates quite easily. Yours, Kas.
