Recently active topics in PBwiki tagged with special characters

How do I include a different font in my wiki, ie one that includes IPA extensions and the like? (Gentium)

I'm trying to link pages that I've created to a central page. Done dozens of these - but now when I try to add the link it takes me to create a new page instead. Tried many different things - same result. Help! My students are waiting to get on the wiki to post their assignments!!