Hi Lance,
Thanks for talking through this with me on the phone just now. It is a really strange one! I've just tested it on every version of Mac OS X here from Snow Leopard to Yosemite Beta and it's working perfectly. Fingers crossed now we've got you up and running on Google Chrome things will continue to be smooth and trouble free - keep me posted. In the meantime I'll continue to look into this and would certainly be useful to know if anyone else has experienced this issue on the Mac? I suspect if anyone else had I would have heard about if by now as nearly 30% of app traffic is from Safari!
Rob