3.1 beta 31 is out
* New option values: you can prevent the screen from sleeping for two or five minutes.
* E-ink themes now available for all devices. Use “The screen is e-ink” option in the “Appearance” section to force.
* Fixed opening files from external file managers.
* Minor fixes.
We release an update of the stable version, that adds the external manager fix, later this week.
Android beta page on fbreader.org
