Brady Lane figured out a simple method to post pictures right here on this forum:
"Here is the work-around I use to post an image: The image has to first be hosted somewhere online (Flickr or some other website). Then I open up a separate browser window with the webpage that has the image on it and simply drag and drop the image to the message window here on Oshkosh365. If that doesn't work, try right-clicking the image to copy it, then paste the image in the message window. Hope this helps."
It works, too:

In my case, I use Photobucket.com to host my pix. I simply drag and drop images here.