Hi John,
I believe that this site started out years ago in pMachine, I know the owner has been around the community for that long and there were references to pMachine in the config file I moved over.
Since an update to EE 2.1.x and/or a move up in PHP versions will break most older vintage add-ons, I don’t move any of that stuff to a new site and didn’t look to see what was installed. We did have to uninstall the wiki in order to get this site’s data through the upgrade scripts in the installer.
The only thing that really stands out about this site to me, is that it has only 2 members, and both are super admins.
The site is a classic blog, with only a half dozen non-blog content pages and thousands of blog posts so it didn’t need many add-ons for functionality like some of the CMS sites EE is used for today.
When we move a client from 1.6.x to 2.1.x we try to abandon the old site and not start the new site with old data, we just do a clean instal and move content over by hand. With close to 4,000 blog entries, that wasn’t an option this time.
Every time we’ve had to build on a converted site, we’ve run into strange things like this. That said, EE 2.1.3 is pretty stable and with the exception of all the issues right now with the Category editing, sorting and such, has been the best yet. The rest of it seems to have done the update well, including the tabs in the publish page that were such a mess for months last year.
Looking forward to 2.1.4!