MCS has a clever watermarking program that isn’t actually all that clever. If your referral headers are blank, or not from MCS, then every image gets the (ugly) site url slapped into the lower right hand corner. The idea behind this was to prevent hotlinking, but sometimes it backfires such as the person above. 99% of the people visiting the site won’t have any problems, but if you do see the watermark on any of the images, you can just simply reload all the images, with the proper referral headers.

Confused? Just hit control+F4 control+F5 to refresh your local cache, should fix it. (thx goatsgomoo)