OK thanks for letting me know, I can see how that would be frustrating.
"...(apart from one email, you're the first to report this so it seems that hardly anyone still uses FB as a sharing tool)..."
I think this is conditionally true - true for perhaps the majority of your current users, but totally not true for the majority of your potential users.
(Just that when I read through this user forum, the impression I get is that I'm in the company of mostly men who are also serious photographers and generally pretty clued up about IT (would know difference between SMTP and POP etc...). I don't fit that profile (have to Wikipedia everything tech
, but enjoy PSU because its the best tool out there for giving me control over my collection, and I think if only it was a little more social then a lot more people like me would also want to use it. After all, its also a very friendly and helpful community