This update has some mapper "corrections" which remove the white artifacts commonly seen on Mapper 001 games. Prior to this update, there were white artifacts noticeable onscreen that were commonly seen in Tetris, Metroid, etc. Most games seemed to have this "glitch" where white artifacts would appear on "scan-lines" on the screen. With this update, those artifacts are gone. Now keep in mind, some games will still have random white "artifacts" just like the N8 was showing, but those are actually part of the game. They appear on the actual carts on actual hardware as well. This update removes the extra ones that were seen in a lot of games. So numerous updates were done to the mappers to remove this artifact.
Ever since Krikzz released the "test" mapper, it's corrected the one and only issue i had with the Everdrive N8. This is now the perfect flash cart, in my opinion. (Running Everdrive N8 in a front-loader NES with the HiDefNES HDMI Mod installed).