I have noticed several times over the past few days that the browser's "back" button seems to be disabled on some pages in the Forum. It happened one or two times in the past few days...but has happened about 5 or 6 times already this morning. I usually look at a thread and then use the back button to return to the listing of all the threads. My guess is that one of the ads on the page is disabling the back button. Correct? If so, this should not be allowed. I have had to close and restart the browser every time to return to the main JK page. This does not happen on any other websites.