I've just realised that I'm not seeing the AB logo above the "Welcome Back" box & that the FB, Twitter & G+ symbols above "Latest Posts" are also missing - I don't care about them, but thought it best to include the info.
Also, whatever is in the central ad box at the top (above the "Search" box) refuses to load on 9/10 pages.
I have no adblocker running & am using Firefox 18.0.1 - the items show if I use Chrome.