Well that's the fun part Jeff John, you have to look for them. Back in my Spidey collecting days there was a site called STL, now sadly gone, that had a section for printing errors. It was very popular. Just as everyone thought every ASM error had been found I flooded the site with another ten or so which I found whilst hunting down pence copies and the like. I remember the site owner, who would sanction new postings, saying I had Spidey error collectors 'tearing their hair out'. Wish it was still online
Anyway, who knows what Flash errors are out there. You could be the man to find them JJ...