A new preview build of Windows 10 Mobile has surfaced, shown running on a Lumia 830. It's numbered 10158 and may not make to participants of the Insiders program, who will instead get a 1016x build later on. Even the 10158 version is faster than the previous 10149 build.
This one brings some important changes though for one Windows Store has graduated from Beta. To celebrate, it live tile is now transparent. Microsoft Edge (the new browser) also got a transparent tile, while the People app got new animations for its own tile.
The camera supports 120fps slow-mo videos. The Wallet app has been upgraded too though the changes are unclear.