NASA explanation for blacked out portions Mars Rover images doesn't appear to be valid?

Now this supposedly happens when the rover transmits the picture and some of the data is missing. The rover is supposed to transmit the data later. If this is the case with the blackout picture was it loaded to the other web site before Opportunity had a chance to transmit the rest? The NASA raw image section contains the entire image. The image is not in the NASA press section.

Also I wonder about the fact that the smaller block on the left , it does not make sense logically based on how JPGs image files are encoded and decoded. The missing section should be straight across if some packets were missing or dropped. I don’t think it would create a perfect smaller block on the left below.

Image Orientation JPEG files from www.w3.org
In JFIF files, the image orientation is always top-down. This means that the first image samples encoded in a JFIF file are located in the upper left hand corner of the image and encoding proceeds from left to right and top to bottom. Top-down orientation is used for both the full resolution image and the thumbnail image. The process of converting an image file having bottom-up orientation to JFIF must include inverting the order of all image lines before JPEG encoding.

If you understand how the actual file is encoded at the binary level it is seems impossible for the image to be blacked out in this fashion blacked out image. it is illogical. It was originally found here http://lyle.org/mars/imagery

Did the UFO image slip through, did someone on the inside do it on purpose so the word could see?