I have a reverse proxy pointing my WordPress Blog (CNAMED at blog.example.com) to www.example.com/blog/
Most everything is working well except for comment reply links. Those are skipping the /blog/ and going to www.example.com/category/post/, resulting in a 404.
Is there a way I can fix this without editing wp-includes files?
The following gets called by WordPress while getting the reply link.
Use a custom filter to provide your own link. I don’t believe there is a direct way of altering just the URL, you have to inject the url into an html string yourself.