Thats one thing I like about the Opera browser, pushing the back button doesn't automatically reload the page, it just grabs the one out of the cache. This means if something gets messed up when I hit the submit post button, all I have to do is go back a page and I'm back to the edit screen where my post is just as I left it. Often when I'm writing a post, I'll use the back button to see the entire thread, then when I push the forward button my post is still there waiting to be finished and submitted.