I got few computers in home and the day when 13.04 came out installed it on one of them and saw that it had issues with automounting, others had different issues. SL 11 was the most solid build, all of the reputation for the stability of Sabayon gone since 13.04. For your computer the releases higher than 11 might work okay, but the rest of us it isn't working okay in comparison to every single distro that I've tried past 2 years on this computer.
With the current transition of Sabayon supporting systemd, it should be somewhat expected that things get broken more than usual. But they will be fixed before any official release comes out.
I am literally pissed off that I have to install firstly SL 11 and then do upgrade on the whole system and it have to download around 700 MB. I'm running SL 11 with systemd,upgraded to the lastest kernel and software, but I am unable to have this in 13.04...becase of issues. Currently running SL 11 with systemd without issues, can you tell me what's wrong with 13.04 and later releases ?
edit: Again, this issue is not comming from systemd,kernel or the software, but the releases and their configuration files.