Facebook will now start acting more and more like Twitter: "If you are building anything on our platform that we might want to build in the future, then you'll get thrown off the platform eventually."
How much was Voxer paying for the access?
I don't mind. Voxer has been constantly sending me useless "messages" whenever my Facebook friends join Voxer. I get at least 1 or 2 every week.
Maybe this has something to do with Voxer's contact privacy and security issues: http://www.petergmcdermott.com/2012/01/voxer-contacts-privac...
and
https://support.voxer.com/entries/20864097-security-bug