Sending 404s can't be intended behaviour. Nobody wants to make their site look more broken than it is. Did you get any response from support when you told them about the bug?
you'll be laughing, but, yes, it can!
here is my "Feedback" request (as Mark don't quote original requests I had to recall it):
this is just one of a Mature blog posts:
(navigation in other posts is broken the same way)
this is where this post category link leads to ("Not Found" Global Tags page):
- why Mature blogs which are not part of the Global Tags system are forced to link to it?
- why their post Category links are leading into a 'Not Found' page, which don’t even contain the post that sent you there?
here is the response I've got:
From: support @ wordpress.com < Mark @ wordpress.com >
Date: Wed, 10 Oct 2007
Subject: [WordPress #KNH-592276]: [categories] [options.wordpress.com]
Why the Category links within a Mature blog posts
lead into "Not Found" Global Tags page?
I've checked udoj.wordpress.com and it is working as I would expect.
see: "it is working"!
just not as you or your casual visitor (or anyone else but wp.com staff) would expect...
now this is really a "hands down" situation.
and it's not even about that 'ad revenue is more important than accessibility'. as I've already said somewhere:
* GT pages don't have ads on them, Matt said:
We don’t show ads on that traffic, and our business is such we don’t need to.
* GT do increase distribution of other categorized/tagged .com blogs within a total number of page-views, however they don't increase net page-views number on .com.
if it were about 'ad revenue' indeed, then I wouldn't even bother myself to mention it anywhere and shut myself down, because this farking GT system would be reasonable, at the very least.
but it's NOT even about profit (or, at least, I can't see how), and that's exactly what making it so absobloodylutely mind-boggling.