I'm usig static front page with custom permalinks /%postname%/
I have three languages installed, three main pages and three empty blog pages for each language. Everything was fine with WP 3.5 and Polylang 0.9.8
After upgrade to WP 3.5.1 and Polyang 1.0 I see all posts from all languages on every blog page. Everything else works fine (i.e. archive by year).