Re: autoload and auto-compression-mode

[Richard M. Stallman]

      The only reliable way
    to change load-suffixes for an ordinary user is to customize the
    (defcustomed) variable `jka-compr-load-suffixes'.

Isn't Auto Compression mode going to change the new variable,
`load-nosuffix-suffixes' or `load-file-rep-suffixes', instead of
changing `load-suffixes'?  If so, prograns will no longer mess with
`load-suffixes'.  So you should add it to cus-start.el.