Thread:Extension talk:S5SlideShow/Call to a member function getHeadItems() on a non-object/reply (2)

Hm. Sorry for not answering again :) just turned liquidthreads notification option on at last...

The problem is very strange, it seems $this->getParser->mOutput is NULL on your wiki while it can't be NULL in that position :)

And I've just tested the extension on 1.21 - it works... Maybe it's related to some other installed extension? What of them do you have installed?