When attempting to view the catalog you are met with this page
http://www.roblox.com/Login/FulfillConstraint.aspx?ReturnUrl=http%3A%2F%2Fwww.roblox.com%2Fcatalog%2FDefault.aspx
Maybe it’s related to this? http://www.gametest1.robloxlabs.com/User.aspx?ID=21557