Profile Age Bug
If you go to your Settings and Profile then try to change just your age and nothing else then click update profile. Then it says "Nothing Changed". So it will not update unless you edit something else with it.
I use Firefox 12.0 as my web browser and I have a Mac book pro with Mac OS X 10.7.4.
First obvious solution is fix the coding, but I would make it so that people can put in the day, month, and year into there profile settings and then it will automatically change the persons age on there profile that others can see.