Why are there black frames in my project? again, as a prologue, I have close to no experience with Blender. Just getting into it driven by the fact that my Son wants to be a Minecraft Youtuber, and thus needs an Intro. So I found a free Blender template and just started jiggling.

Here's the current state. It's actually being synched to this place whenever I save locally.

https://drive.google.com/open?id=0B9par3l2T-UJQ1paY0tZRXlpN0E

From frame 42 to 52, the rendered output just shows a black screen. This is because the original music had a break there, but the music I will use doesn't. I'm unable to find where this is defined. Any ideas?
I've tried to delete all things from the scene, then add new cube, camera and lamp. Even this doesn't help, hmm... curious setup.

But you can try create new scene via Link object and data.

1. Switch top tab to Info



2. Hit Plus to add new scene and choose Link Object Data



3. Go to Compositor and make sure you are working in a new scene



4. Now your image should render fine. (I switched plugs for Alpha Over node to show final render)