I'm still fairly new to Mac and I found a small issue that is driving me crazy. When composing an email in Yahoo mail, the address box does not auto populate as I type in the names in my contact list. I thought it might just be Safari causing the problem, but I downloaded Firefox and the problem continues. When I use any other computer, my contacts automatically populate in the To: box. Is there an easy fix for this, or is this something Apple has overlooked?