This is a general question but it does have to do with these forums. On my main PC, if I select a thread and then click 'Back', the previous screen downloads again, making browsing very slow. My other PC's don't re-download the previous page, just go straight back to it. I have checked all the settings for IE in Internet options and they appear identical. It happens on other sites too. Any idea why this might be, it makes surfing a chore.