Re: Home page other than Wiki page
tikwiki1.9.2 gets out with a bug around articles/html. So far I remember it is only in preview. But I don't remember.
The fix is here
http://sourceforge.net/mailarchive/forum.php?thread_id=8871541&forum_id=15900
Otherwise you can pick up the last 1.9 cvs version from the site de.tikiwiki.org
For the home page, I can't succeed to reproduce the problem with Hoempage=articles for anonymous, homepage=a wiki page for some groups.