We have a new website but rather than force members to start using it we allowed existing members the option to continue using the old design. However, we strongly recommend that all users take the initiative and switch to the new site to avoid issues, as we are no longer actively developing the old site.
Switching is easy. if you are on the old site you will see a bit of red text in the upper right corner by your profile inviting you to switch.
New HotCopper:
Old HotCopper: