I was trying to upload a new version of WinAGI to the AGI wiki, and discovered it's broken. Something is wrong with the way it handles links to other pages.
Links that use a typical page/subpage hierarchy such as
http://agiwiki.sierrahelp.com/index.php/Main_Page give a 'too many redirects' error, but if you format the link as
http://agiwiki.sierrahelp.com/index.php?index=Main_Page then it loads fine. As far as I can tell, all internal links to other wiki pages are using the broken format. This makes it nearly impossible to navigate through the wiki.
As a workaround you can inspect the address of the page you want to go to then type the page in manually, adding the '?index=' syntax in place of the 'slash' syntax.
The SCI wiki has links that include the '?index=' format for the most part, so it navigates between pages without error. One exception I found is the 'Random page' link. It returns a page formatted in 'slash' syntax, but curiously, it doesn't give an error, it just dumps to the main page regardless of what the actual page address is.