The layout of my dashboard is messed up and makes viewing Recent Activity difficult/impossible

I just added two companies to "follow". Now, my dashboard is not laid out correctly. In Firefox, the left sidebar is as wide as the entire page, obscuring the Recent Activity entirely. In IE, it is not quite as wide, but it pushes the recent activity items over about halfway (the items are still visible in IE).

I have screenshots of both if you provide a way for me to send them. Thanks.