The error is actually on the flight booking? Hmm not 100% sure on this one. Which airline is it?

dates of birth doesn't actually show on the tickets as they are printed. names and dates of travel is correct, also looked on changing info and nothing was mentioned about the date of birth.

Dont know if this helps but we (well I ) once booked a flight on line and after we'd got the stuff through realised that I'd not got my name right (!!!!!) We phoned the company - I think it was Excel ---- and told them and it was changed with no problem at all. I think we got confirmation of the change. If you are worried I would contact them just to check -------- it is better than finding out on the day of the flight that there is a problem

I would ring them and ask them to correct it, just to be on the safe side so it matches the passport.

I can remember a few years ago, I went to Cyprus with a group of friends and the holiday was booked over the phone. My surname has two S's but because the holiday was booked over the phone/similar sound of S and F on the phone, my surname was spelt with two Fs instead! The company changed it and there was no charge because it was just a genuine mistake, not changing the details about the person going on the holiday.