Skybox background flickering on Android

[Teonnyn]

I'm trying to set up an input field where I can type in a character name, but while it works, I've noticed that every single time a keypad button is pressed, the skybox flickers black. This isn't the only time it's happened. My game is currently set for a quick-play Portrait style display. When I set it to Landscape, the skybox stayed black. I'm using a standard Unity skybox at the moment, with alpha turned up to 255 on the main camera as suggested in another post. The main camera is orthographic.

Phone: Galaxy S3
Android: 4.1.2
Unity3D: 4.1.3

[Teonnyn]

Tried using Mobile/Skybox.. so far no difference. Even set the alpha down to zero on main camera. My next try will be using a custom skybox.

EDIT: Changing over to a custom Skybox using Mobile/Skybox fixed the flicker. I'm not sure what was going on, can't imagine that the default test skyboxes would be too complex for Android o.O