Well… just to make a summary and clarify some things. This topic discusses 2 bugs of v0.9 which probably few people will experience.
1st bug reported by jussi.r
In some circumstances, posts, pages and so on are not displayed anymore in the posts, pages lists in the admin panel. As far as I understand, this is due to the new content language filter I added to the admin bar which was not robust enough. During my tests to reproduce the bug, I found that it occurs when editing a language, but when I chose a language in the filter, posts are displayed again.
2nd bug reported by susannetamir
Polylang normally hides languages which have no associated posts or pages in the frontend language switcher (widget or menu). v0.9 does not act like this.
These two bugs should be corrected in the development version. This development version (0.9.0.3 with 4th digit) is not released (i.e. is not proposed in the “automatic” update process). Only the future 0.9.1 will be officially released and proposed for “automatic” update (to come soon).