Vernon Hester had previously written up (twice now, actually) a breakdown of ROM bugs he found while developing SuperBASIC. I had reached out to him for clarity on a few, and he got back to me on all but one. While I was holding off until I heard back on the last one, recent Facebook activity (actually 2 posts) about ROM Bugs led me to conclude I should probably announce and add the page.
So … if you would like to see the bugs he found, head on over to the ROM Errors page, with all but 1 duplicated.