Ok, I'm trying to set up a site so that a user group can add wiki-type pages and then edit them. Here's how I BELIEVE this should work based on my read of various documentation and the UI:

1. I turn on advanced permissions.
2. I set up a group, let's call them EDITORS
3. I set up an index page, let's call it WIKI.
4. In the WIKI page, I go to advanced permissions:
a. Add Group -> EDITORS
b. Set: By Area of Site
c. Currently Viewing: Sub-Page Permissions
d. Check off "Wiki Page"
e. Sub-pages... Inherit page type default permissions
[My understanding of the system is at this point an EDITOR can now add a page of type "Wiki Entry" below the WIKI page... Is this correct?]

3. I set up a Page Type, let's call it Wiki Page, then set permissions so editors can edit a main content block, and add and delete additional blocks of various types.

However, at this point, C5 takes me back to the login page, and I cannot exit this page, it keeps looping. I have to log in as an admin.

I've been messing with this for a while and it's very frustrating. Based on what I've read, it's not a problem with the permissions, it's my understanding of how it's supposed to work.