I've emerged emacs, slime, and hyperspec-7.0. /usr/share/emacs/site-lisp/site-gentoo.el and 70slime-gentoo.el both reference "/usr/share/doc/hyperspec-6.0" when they should be referencing hyperspec-7.0. Reproducible: Always Steps to Reproduce: 1. emerge emacs slime hyperspec There's also a warning in site-gentoo.el to not edit the file, since it is generated by portage. No big deal, since it's easy enough to fix by hand, but annoying. I really don't know whether it's worth the trouble.
James, thanks for reporting this bug, and certainly it is important to fix. I installed the hyperspec documentation with a symlink and adjusted app-emacs/slime and app-emacs/slime-cvs to use the symlink. This should prevent this bug from reoccuring. I didn't version bump in this case, so just "emerge hyperspec slime" and restart emacs.
That seems to have handled it.