THIS IS A TEST! It is only a test! If it were not a test, I would not say it is!
I noticed that someone had posted link to an image on their DropBox space. When I clicked on the image/link I got a new page with the image on it. It was, I think, intended to be a link to download the image from DropBox. That could be done with a control (right) click, of course. I am wondering if this is a function of my browser (Chrome), DropBox or some settings in my System. Therefore, I have uploaded 3 versions (gif, tif, jpg [PSD is not allowed at PB]) of the same image to both DropBox and PhotoBucket and designated each as a link to them. I will see how they are handled by Chrome and maybe Firefox and Safari. You are welcome to see how your System/browser handles the links as well, if you want. Otherwise, please move along... nothing to see here!
BTW, I'll probably delete this entire post after my tests are complete and my paper is published.
I am getting the following warning when I adding DropBox img code:CODE
You are not allowed to use that image extension on this board. A valid format is: http://www.domain.com/picture.gif, an invalid format is: http://www.domain.com/picture.one.gif
The url for PB is: "http://i1327.photobucket.com/..."
For DropBox, it is:"https://dl.dropboxusercontent.com/"
Both those use the "." before the actual site domain name. Not sure that's the 'problem' and the images are displayed in the Preview, anyway (except for the tif from PB). 
I'll go back and look at kimmer's DropBox code...
PhotoBucket links:
Ah HA! kimmer did not link to the displayed image. She has the mages on her own site. The links are just text links to the DropBox images. So they will probably require a control/right-click to actually download.
Yup, the images are stored at our site so that I don't take up TS space or extra bandwidth. 
Hmmmm ... when I click the link to your full version stored at dropbox, Chrome autodownloads the photo. When I click the link to my full version stored at dropbox, Chrome opens the image. The only diff I can see is that you used a tif and I have a jpg. I'm going to try a tif of one of my pics and see what happens.
Edit: okay, removed the jpg and put up the tif. It's a lot larger kb wise, but now Chrome autodownloads the image. I'll modify the other one as well.
PS: Good thread, don't delete.