Source file is newer than byte-compiled file

[Florian Beck]

Whenever I have a source file more recent than the byte compiled file, 
Emacs warns me but loads the byte-compiled file nevertheless. Is there a 
way to make Emacs do the opposite, i.e. eval the source file instead of 
loading the compiled file?

I recompile my elisp files in `kill-emacs-hook', but for some reason 
that doesn't seem to be called when Emacs is killed (eg. by `reboot').

Anyway, I am sure there is a way to change the default, but I cannot 
figure it out.