I updated Twenty Twelve to 1.1 today and noticed there were suddenly strange word breaks at the end of lines in posts where previously there were none. If I switch to Twenty Ten or Twenty Eleven the breaks are gone. I've downgraded Twenty Twelve to 1.0 and the breaks are gone as well. While googling I came across this post about a recent fix related to word breaks in comments. Could this be related to the Twenty Twelve update?