I don't think a separate post about the bug will help. Might want to just lead the main post with "NOTE: (bug details)" and then repeat that right above the downloads. In this thread it's kind of buried in the middle. One thing I learned from running Blitz league, is the longer something is, the more people will ignore in it.
So given that Blitz league lesson, maybe do it this way:
When you create a new rom thread, make 2 posts in the thread right away. The first post is very short, and contains only the most relevant info, the ROM, and the warning about the bug. The 2nd post contains less critical details/notes, pictures, etc.