TOPIC: Header Images

I am having a problem changing my header image. 
I had no problem the first time around as I sized everything up in GIMP and configured everything within the THEMES section.
For some reason my first image wants to stick.  If you go and do a google search for Port Orange Home Inspectors, I come up on the second page.  If you scroll over my link, the screen shot shows up on the right, and the image I've been trying for days to upload appears.  If you click on my site www.port-orange-home-inspections.com , you will enter my homepage, and there is the old image.
I am using THEME 8 and am completely baffled at this point.  Has anyone run into this problem?
Good news is my ranking is improving!
Thanks Gentlemen,
Chris Barnard

Looks new to me. Have you done a shift-refresh?

Ok... you make it sound so simple, and you are right.
Since I started using shift-refresh, the results are instant.
Thanks again Dominic!

No problem. This is a big problem with website development. Your computer stores copies of website info to speed up your experience. Of course when you're working on a website you want to see the changes NOW! Shift-Refresh is the answer.