Hi,
I noticed the "pll_get_post_types" action for adding custom post types stops working in the development version (1.4dev17).
My custom post types are not registered by polylang by default, there are no translation options available. So I added them through "pll_get_post_types" action and it works in latest production version 1.3.1, but not in 1.4dev17
The original method is described here:
http://wordpress.org/support/topic/make-my-custom-post-types-multilingual?replies=14