During the facial reconstruction, the large plasma screen used has a 16:9 format, while the actual computer screen running the software is a standard 4:3 format. The image on the plasma screen is clearly the 4:3 image, stretched (and thus distorted) to fill the 16:9 screen. A real crime lab would obviously *not* distort the image (and thus change the proportions of the face shown) - the whole point of the facial reconstruction is to find the correct proportions of how the face looked like.
The DB is visibly breathing during Dr. Robbins explanation of the injuries to Grissom.