Facebook SDK An element with the same key already exists in the Dictionary

Unity 4.6.2 Mono build for iOS

We can build perfectly with 4.6.1, but anything newer causes this error.

Made a blank project and we get the error with just Facebook and Tapjoy. Not sure what unity changed in the newer versions but all of them do this error (tested up to 4.6.4.

We tried doing a check like this: https://github.com/dcariola/XCodeEditor-for-Unity/issues/1

That didn't work. Facebook uses a 3rd party xcode editor, and tapjoy uses a python script. We are guessing maybe facebook still is editing the file when Tapjoy does it's edits. Anyone work around this?