Constantly getting error report when booting my iMac...

I've had my new iMac for a couple of weeks now (specs are in my signature) but whenever I boot it or restart it I get this to welcome me:



This happens every time even though the iMac has been shut down correctly each time. Disk Utility finds no problems and a fresh install of OS X 10.9.1 didn't fix it either. Whilst it's not a major problem it is somewhat irritating. Apple support have offered a replacement but I really don't want to me Mac-less for a couple of weeks.

Any ideas anyone?