I use Photobucket (which makes it easy), and have opened a Flickr account to see how that works (which makes it harder!). I just mentioned Flickr as another popular hosting site. After playing with it, I wonder why it's so popular!
You have to click on the image you want to upload, then click on "all sizes" to access the code that Flickr lets you use. You're supposed to use the first code < a href= etc.> and cut and paste it into the forum like this:
<a href="http://www.flickr.com/photos/48467027@N08/4436053564/" title="4TE7BNKDWH8C_jpg-80x80 by BGrigg, on Flickr"><img src="http://farm3.static.flickr.com/2717/4436053564_44bbe02571_o.jpg" width="79" height="74" alt="4TE7BNKDWH8C_jpg-80x80" /></a>
Which of course fails!
There is also a URL code, that you aren't supposed to use (!), which looks identical to the URL code from PB that works when using the insert media button:
![](http://farm3.static.flickr.com/2717/4436053564_44bbe02571_o.jpg)
I'm breaking the rules, but since I opened up a Flickr account solely to try and help you, I don't care!
If I use the URL code with the HTML tags [ img ] & [ /img ] on either end (and without spaces) it should also work, and perhaps not get you banned! The full code would look like this. Remove ALL spaces to get the image to appear.
[ img ] http://farm3.static.flickr.com/2717/4436053564_44bbe02571_o.jpg [ /img ]
![](http://farm3.static.flickr.com/2717/4436053564_44bbe02571_o.jpg)
It works! Don't know if I'm going to get "in trouble" or not!