After emerging the new baselayout (1.8.4.1) and rebooting, received a "Failed to determine module dependencies" error. This error occurs after /etc/init.d/modules tries to call /usr/sbin/update-modules. The new baselayout moves update-modules from /usr/sbin to /sbin. Recommend either the baselayout ebuild puts update-modules in /usr/sbin or the /etc/init.d/modules script is changed to point to /sbin/update-modules from its current /usr/sbin/update-modules.
/etc/init.d/modules is updated to have it in /sbin. You need to update the ._cfg* files. For more info, do: # emerge --help config.