I have noticed an odd thing when surfing with Safari. When I use the back button, Safari often loads an older version of the page I'm going back to instead of the last version I was at. It is most noticeable when cruising the threads here on MacRumors. You have a page with 7 or 8 threads that are highlighted, you go to one of threads, hit the back button, and all the other highlighted thread are gone! Using the refresh or reload button brings them back. I am fairly new to Mac, about 6 months, so maybe i have something set up wrong. Or is this just a peculiarity of Safari?