I am using a theme we puchased and I replaced numerous graphics, icons and background images to reflect the color we want. However, when I FTP into the theme folder and replace these graphics the old ones still appear in website. I cleared my browser cache and they are still there!

Is there a step I am missing in the admin area such as clear theme cache or something? I can even delete an image from the theme/images folder and it still displays! Where on Earth is the system pulling the images from? Is a preview mirrored somewhere?