Weird...
I just tried adding a #config bit to the SSI for page last updated, and it made most of the footer disappear. Everything after "Dernière mise à jour" just vanished - no date, no copyright, no XMLgenerator tag.
I've removed the #config thing and it's back to normal but i don't quite understand why it made everything else vanish. This is what i used:
code:
<!--#config timefmt="%Y/%m/%d" %X -->
<!--#echo var="LAST_MODIFIED"-->