$wgHooks['ParserBeforeStrip'][] = 'testHook';
You can see what I think that should do, I hope. In reality it does nothing at all, all articles are parsed the same way as without the
Sorry, this ended up being an issue with Zend Studio's cludgy workspace management screwing up remote file locations, that I think was confused by server-side caching. Sorry to take up the space on the list...
SS