Wide screen vs. rectangular screen - Viber button visibility

Hi,

I found a problem of running "wide screen" application, as some parts are invisible. Finally I solved the next problem:

Call buttons of Viber did not seem, thus accepting calls was impossible.
Solution was simpe: in the Viber application, you have to slide your finger from the upper edge of the screen towards bottom, and choose the right icon in upper menu. Hereby, the aspect ratio of current application (Viber) can be set. Call buttons became visible.

The menu can be called in any application using non-rectangular aspect ration.

hate to crumble your world but we knew this a long long time ago

That's why BB10 suggests the Tutorial app the first time you turn on the device.