Thistledoo You aren't 'saving' the posts, you're saving your place in the thread, just like you'd put a bookmark in a page of a book when you were stopping reading for a while.
I noticed the blue book mark too, have read all the posts and sorry I still don't know what to do with it, why would we save the posts anyway. I must be a bit thick here.
I had them yesterday but not today and as far as I am aware I havn't twiddled with anything but then I do find computers seem to like to confuse me at very frequent intervals.
I'm a bit of a fidget with the mouse when I'm on the PC. So the little blue bits are flashing up here and there all the time while I'm reading the thread.
I thought my eyes had gone funny when I noticed it a few days ago! PLEASE don't do that sort of thing to our geriatric eyes without warning us! Btw, where's our news letter? Or are you too busy chomping on the valentine chocs and champagne given to you by your countless admirers?