Apparent Issue with Norton Confidential

I have recently finished incorporating a Flickr slideshow into two of my clients pages. When they navigate to that page they are presented with a warning message recommending they don't continue.

 

The message says something like - Possible fraud detected

 

As I don't have the AV I can't test it myself. Is there any reason why this is occurring and how can I stop it.

 

The offending URL is http://www.watercolourlessonsonline.com/annettes-gallery and http://www.watercolourlessonsonline.com/student-gallery

 

Thankyou in advance for any answers

 

Brendan