Having read through all 76 pages, I'm hoping someone can help.
I've installed on a test server and everything looks fine except the link to
http://url/misc.php?do=forms simply shows the smilie page from FAQ.
The forum isn't installed in a subdirectory (it's at the html root) and a quick look through the misc.php doesn't show any code related to do forms.
I noted in the 3.6/3.8 threads that a couple of people had this issue but couldn't see a fix.
It's odd when the show smilies code in misc.php is a do?=smilies and calls smiliebits
Cheers
Russ