Sorry, I hadn't read the article when I wrote that, or notice that 'dodgy' was their terminology.
Sounds like someone on a DU- or FR-like website for radical Islamicists made comments about attacking Spanish soldiers in Iraq. If it was really from the Al-Qaida organization, why would be posted on a website?
The strained exegesis of the Bush people is exceeded only by the media.
The message board referred to, Global Islamic Media, is the name of a Yahoo Finance discussion board. I can't read it, because it's in Arabic, but here's the link:
http://finance.groups.yahoo.com/group/globalislamicmedia/Looks like there was a group by the same name on Yahoo's regular boards, but which was terminated -- only the archives are available. Maybe they canned because of posts like the one on Spain, and switched to a stock board with less oversight.