Warning appears at the top of all pages in my site . Have attached a screenshot

http://i.imgur.com/zKqkbVE.jpg

This is the screenshot of the warning. You can see it at http://www.thecleanery.com.au it seems to be on all the pages. I am not sure what it means. It was caused by importing content and not a plugin. This is the second time ive asked this as the first person seems to have disappeared and doesnt seem to have read the question at all. Please help i am quite pressed for time thank you.