You don't even have to do that with a photobucket link. Other wise you end up with this:
[/IMG]
That's a pet peeve of mine when I see extra "IMG"s around a picture that didn't need it.
I usually use ImageShack, and get the link of the picture doing right click on the picture and selecting "Copy image address" (you can do that with almost any picture on the web), and use that address with the "Insert Image" button. That works well for me.