Recalbox 8.1 rgbdual megadrive blu borders

[0zzy]

Hi, on my rgbdual with recalbox 8.1 when i run megadrive games (Alladin EUROPE in this example) these blue borders appears. Why not black as usual?
Is it normal?

[Zing]

@0zzy I recommend that you access our official discord, and join the channel dedicated to this subject (#recalbox-rgb-dual):
https://discord.com/invite/NbQFbGM