OK I added the cgi.fix_pathinfo line and rebooted the server. It's still behaving in the same way.
I then went into the libs/ubbthreads.inc.php and added to line 1343 (not 1310 in my install, probably due to some of my tweaks) the ORIG_ part as per Rick's other post. It still isn't working.
Here's the behavior.
I go to the wine forums
http://www.wineintro.com/wineforum/ubbthreads.php/forum_summaryI click on the top area - cocktails. It tries to go to
http://www.wineintro.com/wineforum/ubbthreads.php/forums/35/1/Cocktails_Sangrias_Mixed_DrinkIt ends up showing the main page again with all the categories.
So then I go to the "old style" URL I have hard coded in the left column. Again, the cocktails link, in the old style URL -
http://www.wineintro.com/wineforum/ubbthreads.php?ubb=postlist&Board=35That works.
I think I was confused about the new URLs working after that. I can't get it to recreate that behavior now (although maybe I 'broke' it with these changes I just made

)
So to summarize I can't get spider friendly URLs to work at all on my wine server, which is running IIS. The spider friendly URLs are running perfectly on my BellaOnline server, which is also running IIS. The wine server is Windows 2003 and PHP 5.2.1. I am barely fluent in PHP so all of the PHP installs are very basic.