I don't know if this is worth mentioning in the notes, but I always thought it was interesting that, after the name change to Atomic Bunny, from issues 13 to 16, the covers began to depict the character as having gray fur like Bugs Bunny instead of the usual black. But the inside stories would show the familiar black fur. Then with #17 they went back to black fur on the cover, then back to gray with #18.
The editors were probably hoping to pick up a few more sales from people who didn't look too closely and might buy the books thinking it really was a Bugs Bunny comic.