Apologies if this has been mentioned before but the problem seems to be multiple loading of the same page by the browser - thereby rendering the back button effectively useless, tho it thinks it's still working.
My PC has gone for repair so for the last 2 days I have been making do with a seldom used laptop. When some pages (but not all) in AB are loaded I receive a drop-down warning 'IE has modified this page to help prevent cross-site scripting.
I am not technically experienced so do not know the implication of this but thought I would mention as it only happens in AB.
To clarify IE8. Soemtimes there is no problem, like now, at other times I still egt the "advertisement" link in the last page list. Can not see why or how it is triggered though. Maybe it is certain ads that do it ?