We seem to have been caught out, along with other media outlets, by an image handed out by the Iranians of its recent missile tests which had apparently been digitally altered.
We were alerted to it by an e-mail from a reader, though it appears that a blog, LGF, was the first to spot it. We removed the picture from our site while we checked it out, and then wrote a story about it (which you can read here).
The image had initially come to us via the AFP news agency, who later issued advice to news organisations that it had been "apparently digitally altered".
Various ideas were put forward as to why the image might have been altered, but basically we can only guess.