The area around the site (on my version) is a rather brownish large square (400 m x 400 m, or 1/4 mile across if you prefer); it is a higher-resolution image that was processed differently. At the exact site of the probe, the ground is hidden by the symbol of a camera, on which you can click.
The same as we get, on Earth, when there is a blue square to indicate that some user has posted a Panoramio image on a given site (except that there are very few users on Mars). If I go into the features menu on the left, and remove the "Mars Gallery", the black rectangle (camera) disappears and I can actually the shape of the rover (just at the limit of resolution -- it is not a crisp image at that scale). It appears to measure roughly 4 m x 2 m (14 feet x 6 feet) but it is fuzzy (as expected for an object this small, photographed from orbit).
To me, that is the opposite of censorship, where the image actually gives me better resolution around that site than at other places on the planet.
But we could be using different versions.
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The camera symbol works like the older version of "Street View" on Google Earth, where we had to enter a "bubble" to get a 360 all-around view. I just entered the bubble and the terrain as seen by Phoenix is consistent with the high-definition image (and color) that is given in the high-resoution patch (the large square).