Sure, but that's not it. For instance, I try to load a game like "Alfred's Adventure" from the native file system. It's gonna give me the "this game is for GB Color only" message. So, if I check the settings from there... "System=Auto" is selected, but it doesn't work.
Sometimes it will work, if I then switch to another system option / and back and reload the ROM file afterwards - but not initially. Or, like I said, if I put the ROM inside a ZIP file and rename it to GBC as a workaround. Strange behavior, I know... (and I haven't experienced this in previous versions of OhBoy, by the way)