Lack of Authorship/Editorship Information in Encyclopedic Wiki Entries
All what one finds in wikis are IP addresses and nicknames. The lack of clear and complete authorship/editorship information attached to each entry, including authors/editors' affiliations and credentials, is a very serious quality issue encountered in most wiki-based encyclopedias these days (not just OrthodoxWiki). There are no built-in wiki mechanisms or policies to enforce the presence of such metainformation in every article.
Problem with Citations
Citing a wiki page in your work can also be very tricky (unless one uses the new 'permanent link' feature in MediaWiki to point to a specific revision of that page). A page might significantly change and become a totally different article than the one you were originally referring to (while still maintaining the same URI).
Some Related Links