Some background first:
When I first created a league in OOTP4, and was asked what year I wanted, I very casually chose the year 701. There was no reason not to, and my cities were from empires I'd created with Sid Meier's Civilization (my previous computer-game addiction

), and 701 was hi-tech modern times in those empires, so... 701 it was.
Late in the year 702, I noticed that the players weren't aging: that their ages were being calculated as if it were still 701. I appealed for help and can't recall whether I got much, but meanwhile I noticed something helpful: that those players born in January, February, and March were aging just fine. So I took several hours, edited everyone's birthdays to get them all in the year's first three months, and come 703, voila!, everyone's ages were fine. Every season since I've taken 45 minutes or so, fixed the birthdays of all the draft pool, and the problem didn't reappear.
Until now, with OOTP6. Oddly, the problem is showing up in my _second_ season with it: it had no problem aging everyone into the year 707. But now, the year is 708, and everyone's age is stuck as if the year was still 707. Everyone's, no matter their month of birth.
So: now what? I can't change the year (as Steve and Markus explained just hours ago in another thread), so how do I get the players' ages advancing again, at one year per year? Any ideas?