Every time I visit these forums, a banner is displayed at the top asking me to opt-in to notifications. I click "opt-in," the banner disappears, and no notifications are sent.
If I visit my forum profile, it says my browser isn't allowing notifications:
If I look in Settings->Websites, in the list of "These websites have asked for permission to show alerts in Notification Center," there are no apple.com websites whatsoever, including developer.apple.com. "Allow websites to ask for permission to send notifications" is checked, and I have many other websites in that list.
I consider this to be a bug in Safari, but maybe it’s an issue with the forum itself (although I doubt it). I've submitted a Radar for it, but haven't heard anything back (I never do).
EDIT: I realize I should've put this in another category, but it won't let me change that now.