Today I realized that FB Connect does not return the proxied_email field in about 4 out of 5 times. (I can reproduce this with a single users repeatedly, so this obviously does not have anything to do with privacy options or permissions)
It definitely worked fine last week ago.
I could not find any official info that this field is going to be removed or anything, so... Does anybody else have this problem? Is there anything I am doing wrong that could be causing this behavior? Or is Facebook just having a bad day?