About 15 minutes ago I attempted to upgrade this blog, which runs on WordPress, to the newest version released today, version 2.1. I had read that the database schema was changed in this release, and that it may render some plugins incompatible. Unfortunately, what I failed to realize was that my stats plugin, FireStats, was incompatible, and when I upgraded, my installation was not only fairly odd-looking in terms of the admin UI, but my main blog didn’t even function. In the end, I had to revert back to version 2.0.7, which thankfully wasn’t all too difficult.

The moral of this story? If you intend to upgrade to WordPress 2.1, I strongly suggest that you first ensure any plugins you use are on the official compatibility list, which can be found here on the WordPress wiki.