Magnus,
While closing deletion discussions, I came across this example when someone, using {{reflist}} in the middle of a page, broke the {{subst:at}} and {{subst:ab}} archiving header and footer. As the inventor of cite.php, do you have any idea why? (see this diff: http://en.wikipedia.org/w/index.php?title=Wikipedia%3AArticles_for_deletion%2FWoo_Lam_92_%28protocol%29&action=historysubmit&diff=430898949&oldid=430895929 )
Deryck

(cross-posted to wikimediauk-l in case anyone else is interested)