Why doesn't "inbox" on my yahoo! page got to inbox?

Why is it that clicking on "Inbox" on my "my Yahoo!" page takes me to an overview page instead of displaying my inbox and forcing me to click "inbox" in the left hand menu again? This isn't really a problem: it's a design flaw in the system. Anyone else have any thoughts on this? I'm actually in Yahoo Mail Beta, and I haven't noticed any differences between Firefox and IE either. :| What can ya do, right?