Okay, this issue is partly solved, and it was at least partially user error on my part.
(By flipping the order of the redirect rules – putting the second one first and the first one second, etc. – the /category/ redirection started to work; that is, the HTTP status codes of its redirects are now 301, as intended.)
I still can’t get the login-dependant redirects to register as 301 redirects – they’re still registering as 302s – but perhaps this is inherent to these types of redirects? (I’m somewhat of a newbie in this area.)
Yep, I’m having the exact same problem as mizejewski.
In a private blog that I administrate at work – using the P2 theme – upgrading JetPack to 1.8.1 has inserted the huge space in between the posting area and the existing posts.
I’m debating reverting to the last version of the plugin that worked reliably with WordPress 3.4.2 (1.7, I think, since it seems like people had issues with 1.8.0?).