After a period of development as long as we seem to have around here, RCs are a necessity to increase testing of a build to be released, but still not quite cement it as the final build. I think it paid off for 3.6.10, it seems to be a pretty stable release, hopefully we can spend less time on 3.6.12's RC phase though. A lot of recent significant commits have really improved efficiency in some key areas, I keep hearing reports of 10-20fps improvements as we profile the engine and find some really poor performing chunks of code. Still, I've been pushing for ironing out some remaining significant Mantis issues, and will probably push for a feature freeze in the very near future.