Does anyone know if a recent security update in IE / Firefox / Anivirus / Antispyware.. could effect cookie settings? We use unique users to count of website traffic ( unique users ) I am thinking that cookies used to help count unique users might be effected. I need to explain a drop in website traffic recently and i can't see anything that has changed apart from something messing around with the internal script that counts unique users. Anyone know of a recent security change of some kind which might change the way cookies are handled which would have a large effect - i am thinking of a windows update / IE or Firefox update around early September. Any help apprecated.