Lately when I'm browsing forum posts, and hit the back button on IE to go back to the main forum, the page loads the HTML coding instead of the page. Hitting refresh solves the problem but this is getting to be really annoying. Anybody know why or how can I solve this odd behavior?

Have you tried other browsers to see if you have the same problem. If it persists, then it most likely has something to do with your network, or ISP. Otherwise you can look on your computer. I've never had this problem with html, but maybe you should check your cache, things like that.