Is it possible to get a image instead of text for the threadprefix?
Well, just add your <img> HTML to the Display Style setting of your prefix.
If i do this: <img>http://www.mysite/images/photo.jpg</img>
Then i see the text of te link and not the image.
Because it's not a proper HTML at all.... Also the link seems wrong even though it's an example (no .com/.us/.org etc. ending)..
http://www.w3schools.com/tags/tag_img.asp
<img src="http://www.mysite/images/photo.jpg" alt="Plain text" />