Craig,

Did you make any changes to the operation of the site a few weeks ago? As of about that long ago I suddenly can't get into the "Blogging" section on my Mac. And the "Mark Forum as Read" button just flips the screen to the bottom of the page, where the button appears again---clicking this one works, but then I have to hit "back" a few times to get back to where I was. Neither glitch occurs on the Windows 'puters at work or the library...
I would have suspected an OS issue, but it wasn't doing either thing a month ago.