FotoFinder: Oh, one other thing... take a good look at the two camera tops illustrating the original R. Cicala article. Besides the black tape, there are at least half a dozen other design changes between the two. Different parts, assemblies moved around, etc. Why is this and is one improved? Different plants in different countries? Changes due to recognized problems? Cheaper or more efficient methods of manufacture? Parts or supplier shortages? I'd be more concerned about all those changes in the design between the two models than about a bit of black tape. It does leave one to wonder about who designs these cameras, and how well they are tested BEFORE they go to manufacturing. On the other hand, have three Canon Powershot S3IS "superzoom" PnS at home which are our "everyday" carry around cameras (bought an extra "in case" never used it), and one has over 100,000 shutter actuations on it, never failed me yet. Never took it apart, and have no idea what's in it, but it works, tape or not.
In the second picture the body is angled much more to the left than in the first picture. Also the light falls differently on the two shots.This make it seem that some parts have moved (especially the lower middle PCB) but they are still in the same place. It also makes the black part next to the middle PCH hidden in the second picture. Also the the lighting make some parts seem a different color between the two pictures. I have a hard time finding any differences except the tape.
Also try follow this link (also from LensRentals) and see their Canon 5Diii strip tease:
Note all the black tape. Which didn't bother anyone (has been posted a month now). The link proves that tape is not an uncommon material in electronics design.