SWF Tools trying to handle a list of images when it shouldn't be

Hi

I've set up SWF Tools, all as seem to be working fine except I have a content type with images as part of the page ( thumbnails to be exact ) , I have an error message : "No player is configured to play a series mixed media files. Check the SWF Tools file handling settings on the configuration page."

I have not assigned and SWF Tools file handlers to these fields, as I don't need to or want to. Any ideas why the error is showing?