I received a request asking how to have discussion appear when viewing the wiki page instead of having to click the "Discussion" link. I think this may be a good option to add because I can see others wanting this feature.
I tracked down a corrupt character to around line 162 of WikiManager.php
This function "$wiki->transform($wikitext);" is a PEAR method call. Unfortunately it wrecked this character: ยง or §
To prevent this problem, I put this line before the transform call:
$wikitext = utf8_decode($wikitext);