I've just sent an email to ImageVortex asking for an explanation.  I got a batch of rejects from another site because my IPTC data contained references to ImageVortex.  Now that was news to me and I was about to take the site to task until I checked my source jpg's, on my PC, and lo and behold, in the "Instructions" metadata field was a bunch of html from ImageVortex - on literally hundreds of images.  I did use their upload tool in the past so I guess it has actually written something into the file to make uploading easier, but I can't say I'm very happy about it.  Anyone else noticed this or even thought to check?  Should I be this surprised and p'd off?  Or am I just stoopid!?