Another option to insert a flickr image with the active link :
When you are in Flickr, on the main view of a picture (like this page for example
IMG_27175 | Flickr - Photo Sharing!)
click on 'Share this' button on top of the picture, and choose 'Grab the HTML',
then select the size of the picture,
then choose BBCode (it won't work with HTML !) just below the size
then click in the code above, it will be selected all at once, copy it (crtl+C on PC, Cmd+C on Mac) and paste this code directly in your OB message (do not select the Insert image option which you add some tags).
that's it, it works great ! and the link to flickr appears below your picture and the picture is clickable.
Beautiful picture of the Masde by the way