Yuval @formatc, thank you for posting your finding.
About Android version, my app does exactly the same (3 permission requests the first time the user log in to FB), and it’s been one of the most irritating things that I simply decided to ignore because it appears that’s the only workaround available with issues with FB integration. (I don’t remember the URLs for the threads that articulated the issues that had to be resolved a while back.)
About iOS version, the issue with iPhone 5 does not sound very good at all. What iOS version is installed on your iPhone 5? I’m wondering if it’s the iOS version specific issue (rather than device type specific issue.) Regardless, you may want to submit a bug report detailing this issue so that it will be addressed rather quickly.
Naomi