I've recently run into a strange issue after upgrading to 3.6.5. I've been trying to resolve issues with a failed one-click-update to my live site.
Thankfully, I had a pre-updated backup living on a test server. I synchronized the content and then ran the updates on the test server. When I copy the code base and db to my local machine, the site and content are correct, but when I go to Extensions => database I get notified that the database is not up to date and there are errors.
I'm really perplexed as to what is happening here, because the site is fine on the test server, but has database problems on my localhost setup. Theoretically, there's no reason for this. I don't want to move to the db to live site until I know what's going with this.