Comment # 3 on bug 1231251 from piotrus3g

(In reply to Giacomo Comes from comment #2)
> Try running as root:
>   gdk-pixbuf-query-loaders-64 --update-cache
> and see if then mcomix starts without issue.

I didn't run the command but mcomix works now. I'm on tumbleweed 20241002 now
so some update could have fixed that or the cache updated itself. I'll close
this bug report then.