Hey I bought my iMac on the 23rd of February, 2008. Now when i bought it, it had Tiger pre-installed so i had to install Leopard myself. It was brand new, bought from a local shop called Dick Smith Powerhouse (Australian Shop) They sell alot of apple stuff, except for the Mac Pro and i think the Mac Mini, but they sell TV and Airport Extreme, anyway. About a week or 2 later i called Apple because my mouse was acting up so i had to get some sort of code from them to be able to take it back for a replacement and since this was the first time i rang i had to set up the warranty, And when they asked for the serial number and then the date i bought it, and then they said, and this one of the main parts of this post, That the serial number didn't correspond with the date i bought the iMac, apparently the only date he could put in was around 3 months before hand and would then lessen my warranty with apple, He said i needed to fax something to them to get the date change, but i don't have a fax machine. So what i was wondering, Since i can't just take this back without a reason and get a new one, Would a Mac that was sold around February have Tiger Pre-installed on it or would it have Leopard? because i would of thought Leopard since that was on display and it's on all the adds and posters in the shop. Also, Has anyone else had this problem with the Date of Purchase and Serial Number not matching up? And if you did, Did you get it fixed somehow? or did you get a better explanation then i did? Thanks if anyone can shed some light on this problem of mine.