After reading through this discussion, I have set up my power options thusly: Active Profiles: Because I often travel and want to remote into my machine, and because I'd rather not disable sleep completely, and because I haven't found any way to wake the machine remotely after it has entered safe sleep, my only option remains to disable it.
I find that wake on lan stop working after my Mac Mini (late 2012 model, running OS X 10.8.5) has entered safe sleep (which is 4 hours after sleep starts).
