Steps to reproduce:

1. Set up a forum of the type "Standard forum displayed in a blog-like format"
2. Post some blog posts
3. Reply to some blog posts randomly

Expected behaviour:

When looking at the forum/view.php, the blog posts should always be displayed in reverse chronological order (most recent first).

What actually happens:

The most recently commented (replied) blog post is displayed first (as the forum uses d.timemodified DESC). While this behaviour works well in standard forums, it is very uncommon in blogs. Blogs, by definition, should always display recent posts first.

This is particularly annoying for me at the Plugins traffic blog at moodle.org.