https://addons.mozilla.org/en-US/firefox/addon/bbcodextra/
It has single clicks for bold, italics, underlined, strikeout, images, URL's and other HTML such as lists.
You can cut & past your pic link to your browser and still get the error.
http://upload.wikimedia.org/wikipedia/en/thumb/b/ba/Free_Republic_logo.jpg/200px-Free_Republic_logo.jpg%22
Photos or other images need to be on a web accessible server. Your image tag should then contain the URL address of the image. Try creating an account on Photobucket and uploading your photo there. Photobucket will give you the URL which you can then copy and paste to your FR posting. While it is possible to use the location of images on someone else’s web site this is bad form and likely violates copy rights. Stick with photos for which you have the copyright... Like your own photos or graphics you create in Photoshop.
hmmmmmmmmm . . . .
This is a archaic website. Yet somehow it needs how many thousands of dollar each quarter to run?