Hi guys, sorry for the late reply, had a few busy days myself :) Just a little update: - for IE9, compatibility mode is still mandatory for the forums (sites are working fine without), otherwise menus won't work - read marks are working again but in compatibility mode you'll have to refresh the page (F5) manually to make them show This behavior is not new (at least for me this is "normal" for quite some time) but is easily circumvented: Just press F12, this will open the developer menu. Open the "Cache" submenu and activate "Always refresh from server" after that F12 again for closing those menus. Only one downside, this setting is not persistent, you'll have to do it again after closing/restarting your IE.