The wiki needs people to maintain it, otherwise the information becomes stale and eventually incorrect.
This will become a top-level thread for wiki team activities.
How to request a wiki account
Post a request saying which page you are wanting to update in this thread:
How to request a change to a page
If you don't want to sign up for an account but have spotted an error you can post a change request with the following information:
Ideally a this should be formatted as a diff. If the change is significant and/or long please privately post to a pastebin site and link here rather than filling the thread with information which search engines will pick up.