What can cause a project to go corrupt?

[dvddemon]

For example I have Pinnacle Studio 9, and after I have created all of my movie with menu's, video, effects, titles etc I go to burn to a disc so it has to render. But it hangs as random places during the render and I have to start the render all over again, I try to remove various pieces of video that I think may be corrupt but nothing works. I try to render the sample footage that came with it and it works fine. I would like to know what can cause a project to go corrupt and the only solution is to re-create the whole thing again. Any ideas?

[bugster]

I have never used Pinnacle Studio myslef, but you may want to take a look at northcat_8's comments re Pinnacle
here