To invite images, copy the following code to a comment:
<b>You are invited to add this great self portrait to:</b><br> <img src="http://img171.imageshack.us/img171/1967/iconanuovapf8.jpg"/></a> please add the tag Funny self portrait <br><a href="https://www.flickr.com/groups/614955@N21/">FUNNY SELF PORTRAIT/</a>
Which will look like this:
You are invited to add this great self portrait to: please add the tag Funny self portrait FUNNY SELF PORTRAIT
Please make sure you have copied the invite code correctly when you invite an image.