thats strange… it happened to me too… earlier in the morning. I was rendering a video it came out bad quality and had interlaced lines on all moving objects. And it seems that rendering affected premieres original sequence and all layers are still in tact but their quality is as if they were all rendered.
But if I turn of the effect (movement, fade, fast blur, etc.) they get better. Also when I double click the clip its perfect quality in the edit window… also in the library all the files are perfect.
Booo…
We need a guru. HELP…