You probably need to find out what it is about your host that's stopping that feature from working. That's what the little disclaimer is all about - it works if your server supports it. Truth be known I've no idea what your server needs to support the feature since all the hosting accounts I've used have an do. I think if I ever hit on a host that doesn't let me use b2evolution with extra path turned on I'd switch.

BTW there's no way C can have the same settings as blogs A and B. Like what's in your url blog name and stub name field? You don't have to use stub files, and you don't have to create them, but if you use them you have to create them. It's possible that your server configuration is such that it can't do pretty urls without an existing stub (even if you don't use it), or that you have to have the URL blog name field filled in. I don't know what happens if you don't fill it in because I always use stubs and always have something in that field so this isn't a for-sure this-will-fix-it answer - just some stuff to think about.

Listen don't bother to keep a score. Decide what you want your blog app to do for you, then pick the app that meets your needs. No matter what you choose you'll find yourself dealing with the limitations and embracing the features.

I found it!

1. Both "Stub name" and "URL Blog name" have to have the same value.

2. "Preferred access type" should be "Automatic detection by index.php".

This last part was what got me confused. My selection for Blog C was "Automatic detection by index.php", just like Blogs A and B; so initially I didn't bothered filling in the "Stub name". And when I finally tried something there its value happened to be different from the value I was testing in "URL Blog name".

Why the "Stub name" is important when the preferred access type is not "Explicit reference to stub file (Advanced)", I've no idea. But for the posterity, just follow the two rules above and everything should just work.

Thanks

Cool. Thanks for the followup. BTW the URL blog name is what your media folder will be called if you use blog-based directories when uploading media.