At a tangent to Flocsy's interesting thread about receiving notifications:
I don't actually miss the notifications, because I have the Thorn Forum set to show only unread posts on the Forum opening page. This is easy to arrange, at least on a Mac. Open the Thorn Forum in Safari, set it up as you like (I selected unread posts) and then drag the URL of this modified page from the address slot right at the top of the Safari page into the Favourites Bar. Before you click anywhere else, first edit the URL to be shorter (I have THORN). If you don't have a Favourites Bar, on the Mac you can switch it on in the View dropdown menu of SAFARI, right at the top of the screen. Now, when you want to check the Thorn Forum, just click on THORN (or whatever you call the Forum) in the permanently visible Favourites Bar, and bingo all the new posts are shown. Before this works for them, new members should of course mark all previous messages as read, or they'll be swamped by years of unread messages, which are more usefully accessed through the powerful Search function of the Forum.
I'm sure there's are Windows and Android versions of the Favourites Bar too, which I hope someone will tell us about.