I updated yesterday on my home PC without a problem, but just now I updated from 20150127_1 to 20150127_3 on another PC and had the problem, that the default services were removed but not reinstalled. I was missing the whole "single" runlevel and all TTYs from the "default" runlevel, effectively pulling the system from underneath my feet and leaving it unable to boot.

I assume this happened because the default links in /etc/runit/runsvdir are removed since they are no longer package content and the INSTALL file had no chance to create them because now all TTYs were immediately killed by their runsv-processes.

I do not think this will be a problem in any further updates, but right now I guess others could run into this too. Maybe the INSTALL file could install a helper-service pre-installation, that checks after a couple of seconds if there is at least one TTY running and if not install them as the post-install-process would do. After that it could remove itself. I can submit a pull request when I'm back home later today.