I have uploaded a photo to my profile, but the people I play with can't see it. I can see it, though. Why is that? Do I need a premium membership just to display my profile picture?

Thanks for helping me out.

Your profile picture is showing up: on your profile page, in forum posts, and in your games list. Perhaps your opponents need to refresh their browser cache by Control+R.

Okey, I will try to tell them that. Thanks.