I use on my http://www.pivari.com WordPress 3.5 Release Candidate 2 and Twenty Twelve.
I've noticed tha the title of every post is = post title+blog name without space
e.g. for http://www.pivari.com/software/attenzione-backdoor-sulle-stampanti-22990/
<title>Attenzione: backdoor sulle stampanti!Consulenza internet marketing</title>
How can I set it? How can I change it?