very good job with 20061006 version.
But i experience a minor problem. probably a bug?
when I have proved in a modle with "latin" character set, The Nwiki looks pretty, but Exprot PDF uses UTF (it means that all the á, é. í, ó ú , ñ... were changed to "extrange" characters).
Then I made a test migrating a moodle to UTF (vers 1.6.1 with Nwiki 20061006 and several Wikis in their courses). In this case, the Pdf exports is readable (all the "spanish characters" looks fine) but the wiki isn't: the characters á, é, etc. are changed in the wiki.
It sounds like the wiki pages uses "iso.latin" as default character set while PDF uses UTF-8. This could explain why in the first case wiki performs well but PDf not, and in the second PDF looks well but wiki not.
Anyway, I hope to migrate my production moodle (with several wikis) to utf next month. But I need to know before how to guarantee I will not loss wiki data.