Main index :: common error messages
This error may appear when you edit a campaign. It is caused by the campaign content containing links that are click-track links.
These links will look like
http://yoursite/lists/lt.php?id=XXX
If links like this are found in your content, it means you copied the results of a test campaign, or other campaign back into the phpList editor. This should be avoided.
Remove the links from your content and replace them with the original URL.