I've tried the copy and pasting of the BB code from my flickr page countless times,but all I get is a red X when I try posting here!:shake:
I right click the image I want to post and click "copy image url" then paste that between the image tags. Easy peasy!
Note that the share button you see in the guide has just changed on flickr. It's still in the same place but they have put facebook and twitter icons instead of the word Share. Just click on the small down arrow to the right of those icons.