I'd like to suggest this change, because i believe SE4 is much more popular than SE3. This helps people faster use SE4 section of the forum.. I can't count how many times i missed SE4 section and entered SE3 mistakenly.. Or maybe you can make dropdown menu instead of the current horizontal menu?
1st change:: What if we change the positions of Social Engine 4 and Social Engine 3 in the menu?
2nd change:: What if we make dropdown menu instead of horizontal menu?
3rd change:: What if we swap SE4 and SE3 sections on the homepage of the forum?
My suggestions are here, feel free to place any comments regarding these changes. Thanks