The version linked from the wiki actually is the latest release version. Have a look at the list of available sources at http://www.fbreader.org/about.php and you will see that the latest version available is 0.12.10. Since there is no more recent source release, what should be updated in which way?
Ah... I see that they're not doing active development for "other platforms" atm.... I got confused with the version numbering between the old sources and the current development (for meego and android).