Cycles Baking Error

I have the latest build, tried older builds and still doesn’t work… I must be doing something wrong… I refuse to believe its just my hard luck I’m doomed to one of the few that have this problem. I’m looking forward to joining in the fun soon.

I keep getting:

Traceback (most recent call last):
File “<blender_console>”, line 1, in <module>
File “C:\Users\Admin\Downloads\Bake_Cycles_Win7.x64-3cfab89\2.70\scripts\modules\bpy\ops.py”, line 188, in call
ret = op_call(self.idname_py(), None, kw)
TypeError: Converting py args to operator properties: : keyword “is_save_external” unrecognized

File:
bike.blend (1.22 MB)

I cant seem to find anything… I’m like ripping my hair out in frustration, I followed the tutorial exactly but its not working. I don’t get it, what gives? Does no one else have this problem? I’ve spent to much time already anyone know of any way to export materials out of cycles for use with web gl?