As part of migrating to a new account at Dreamhost, I had to regenerate my blog from an old SQL dump backup email. Not quite as easy as from an actual WordPress export, but I made it work. However, something got messed up with the RSS feed. Turns out my old blog install had the following in the /blog/.htaccess that didn’t make it into the new install:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /blog/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /blog/index.php [L]
</IfModule>
Adding it to the same place in the new install fixed things, but changed the location to https://www.mbeckler.org/blog/?feed=rss2 . Just an FYI.