The last week or so, when using facebook, if I go back one page, it's totally blank. If I then try to go forward again, it's totally blank. Everything's suddenly blank. This only happens to me on Facebook with Safari. Any ideas? I have no extensions of any kind except ClickToFlash. Example: I log in, click the "Profile" link, then three finger swipe back, and the main page is now blank. Forward: Profile is now blank... ?