Several times, I have tried clicking File->Export->Media, and suddenly adobe premiere pro would tell me that a serious error has occurred and then the program closes. This was during a 1280 x 1024 square pixel resolution video. I have not tested any other resolution. This error would occur if I had rendered my media and then clicked File-Export->Media. If I delete the render files and then click File->Export->Media, the adobe media encoder runs fine and no problems are seen.