Preview for Developer smartphones are getting a newer OS build
Build 14234 is now being rolled out
Update: It seems to be a small configuration update for Preview for Developer devices. It takes less than 10 minutes to install.
Original story: For those users who have joined the Preview program for early Windows Phone updates directly from Microsoft, there is a newer OS build for their smartphones.
OS version 8.10.14234.375, which is already on Nokia Lumia 920 and Lumia 820 through the Denim update, is now available for other Lumia devices through the Preview Program. The previous OS version for Preview phones was 8.10.14219.341.
Check for updates by going to Settings, Phone Update.