I wish i saw this too...
But my solution instead was to download the Yosemite Public Beta 1 and installing that on top of Developer Beta 6 and it worked.. Running Build 9.0.24237 fine now. If the above don't work, install the Yosemite Public Beta.
Now i'm downloading Developer Beta 5 and installing it on top of the Yosemite Public Beta...
Pondering whether to even attempt putting Developer Beta 6 back on (it really didn't seem much better... just a bunch of icon tweaks and wallpapers really, Beta 5 is stable enough and Beta 6 just brings a bunch of issues with their Gatekeeper Signature changes...)
Last edited: Aug 19, 2014