Thank you, Chad, but what I actually wanted was an explanation of
the bug. If the problem are external images, I presume a link has
to be given somehow, but in our wiki only wiki-like links (ie, [http://...])
are allowed, so I was interested in the details. I presume the fix is
this one:
http://svn.wikimedia.org/viewvc/mediawiki?view=rev&revision=63424
Javier