Hmmm. why?
hey, sorry! 
I was doing the hack to find the average member age, so changed a few things! its fixed, now!
???
It was set so if you had not provided your birthday, and you wanted to edit your profile, you could not without giving a birthday date!
or if a new user registered he/she would have to give a date, other wise, could not register!
o i get it now.