70Challenger

So i just started using SMF Simple Machines Forums (found here: www.simplemachines.org). Anyway, i just updated to the new version 1.0.7 and i thought all way great, however a slight problem occured somewhere during the process. Now when ever i log in, the page goes blank instead of reloading the main page with me logged in, but then if i hit the back button and reload, then it shows up as being logged in. The same thing happens when i go to log out. I hit the logout button, the page goes blank and does not reload the main page with me being logged out unless i do it manualy through the address bar. Did i do something wrong, or is there something in the programming i need to change? If anyone can help that would be really helpful!! Thanks!! is anyone else having this problem or experienced similar? I dont know how many brainy SMF users there are on this site, but i figured it was worth a shot...