What's the difference between an aero crown and a unicrown crown? I just found out that the 2008 Globe Sport has been recalled and I'm not sure if mine is 2007 or 2008 and I can't for the life of me, find my receipt! I'm pretty sure, though, that the 2008 model has an aero crown. Pics of the difference would be appreciated, too. If I checked the fork, where would I find the manufacturers mark?

Thank you in advance.

EDIT: Also, if possible, I'd like confirmation that I'm correct about the 2008 model having an aero crown fork and the 2007 model having a unicrown fork.