New Post: async on version 2013.01

I have an issue with a function not running async when upgrading SPServices to the new version. The issue I found was at line 1220 of SPServices. In the previous version, the async value was set to the async option I provide. In the new version, it defaults to false if a completefunc exists. In my case, I have a completefunc and still need it to be true for async. Is there something I am not seeing to do this? When I delete the "thisHasCompletefun ? false : " from that line, everything works for me but rather than changing spservices on my system, I'd rather understand the intent better.