Version 188.8.131.52 is uploaded and waiting for certification for the Windows Phone Store.
In the new version you can define yourself the timespan for the live tile counter. Now the timespan is 14 days…a little bit to much i think. The new default value will be 3 days and you can change it down to 0 (zero) if you only want to see the count of birthdays on the current day.
I hope that everything is ok and we will see the update at the comming weekend in the store.