Development Discussion Board

PhpBB should be using this to validate e-mail addresses so that no more "dead" activations occur:
http://code.google.com/p/php-smtp-email-validation/

Aside from this post which is another matter and off topic, it’s mostly a big joke. :)
Yes, I agree with the principals of code reader's point.

Numbers alone mean nothing, but they are never used alone - they are symbolic in what they represent in life. How they interact with each other is also ...

You would simply deactivate the mod(s) you don't want.

What is AJAX?

From w3schools.com :
AJAX = Asynchronous JavaScript and XML.

AJAX is not a new programming language, but a new way to use existing standards.

AJAX is the art of exchanging data with a server, and update parts of a web page - without reloading the whole page.

AJAX is a new way ...

Do you mean to have something like a template file that would just contain the code to display a single post, then (if you were to try doing it using the 3.0 template system) using assign_display to move the output from each individual post to a central output page?
I like the concept behind this ...

Right now, you have a forum and multiple subforums. Users cannot create new forums, as this permission is reserved for the ACP. But many topics should be grouped together, and with broad-based/modular bulletin board systems, moderators and administrators shouldn't need to handle the entire setup on ...

"Modular expansion" is analogous to "software-ism", where programmers can write modules for the base software, like Flash authors making games for Facebook.

The attachment upload interface should be more like the one in MediaFire and Filefront.

I third the idea of reordering forums using a drag-and-drop method.

Now on the other hand, my thought was a new Base style with the use of compatible HTML5 and CSS3 in preparation for future markup standards.
If that was the case then using prefixed selectors would be optimum because it's all fresh anyway. ;)
I second the use of W3C validation using HTML 5 and CSS ...