that's the only part of the author panel that's been working/displaying correctly. the hyphens thing works, i tried it and has my age displayed for a second until i went back and hid it again (voluntarily this time)
i edited the bit of the FAQ dealing with age to include this...edited a few others as well, a huge chunk of it is just horribly outdated.
How to get your age to show in the author panel?How to show your age alongside your Post Count, Location and other details in the Author Panel – the Author Panel is the bit to the left of your post where your User or Nickname shows along with your avatar if you have one

Click "My Account" at the top of the page to edit your profile. Under "Date of Birth", enter your birthdate in
mm-dd-yyyy format. Despite what the example to the right may say, you
must use hyphens and not slashes, or it will not display correctly in the Author Panel or the profile page.
Some people just put a birth date near their real one, so its clear ROUGHLY what their age is, but without giving their exact birth date because they are cautious about identity theft (although I'd think that wasn't all that big a risk).
Please bear in mind that you can't access the adult forum without giving your birth date and being at least 17 years old.
NB Before posting here, please read the start of this thread.