Please if you find more issues with the conversion of Mediawiki syntax to Tiki syntax report them here:
The syntax conversion itself is not handled by Tiki. It is handled by PEAR package Text_Wiki.
I already fixed the redirect issue. Please see:
They will be available in Tiki as soon as there is a new Text_Wiki release. Not planed yet. So I suggest you replace lib/pear/Text with the Text_Wiki svn repository: