I read this old post by CBroe and was wondering if anyone had figured something out yet. I quote:
https://graph.facebook.com/zuck/picture?width=150&height=150 – asking for 150x150, getting 156x156 instead.
Does anyone know exactly how Facebook rounds the custom values? Why does 150x150 return 156x156 when the standard sizes are 50x50 and 100x100?