Does Rendertexture work on flash?

Hi. I have a rendertexture attached to a camera as target texture. What the camera sees is rendered into the texture, that I print later with GUI.DrawTexture(). It was working until today. I am sure I didn’t change anything, but now the rendertexture is empty, not updated. It only happens on flash builds, if I change to webplayer it works again.
What could it be happening on flash? Any ideas? Using Unity 4.0.0f7.

I just realized that render to texture could be only available on Flash Pro licenses. Can someone from Unity confirm this?

I just tested them, and it seems to work fine.

The only thing i can’t get to work is alpha values. I have made a rendertexture that has a circular mask on it, but on flash it displays it as a plain rect.