OP

Quoted from pinheadpierre:

An added bonus was that I had an opportunity to correct a super goofy spacecase mistake I had made in the art. I didn't notice it until I was reassembling the playfield just before the Great Fiasco occurred. Did anyone else notice it? I was going to leave it there like a signature and see how many people noticed it over the years but since I was reclearing the whole shebang anyways I went ahead and fixed it. Here is an old picture of the playfield with the art error from April.

And here is a picture of the section with the error corrected. Can you find it?