Re: Auto '?'
Tiki by default thinks that every "camel word" with uppercase letters inside is meant to be a link. One way to deal with this is case-by-case, where you put reverse double parentheses — like ))PowerBook(( — around such words that are not meant to be links.
Another way is to un-check (turn off) "Use WikiWords" on the wiki admin page (tiki-admin.php?page=wiki). Then words like PowerBook will be treated as normal text, and if you want words to be a link, you must put them in double parentheses, like ((PowerBook)).
-- Gary