I've got an issue on both screens where the bottom pixels are mirroring those just above.
Running on 3ds XL, R4I Gold 1.57 firmware.
This problem does not occur on the old nesds circa 2007 but I've downloaded the latest because I'm interested in the wifi capabilities.
I've tried with/without the provided .ini file however I've never actually seen any other videos/screenshots of a 3ds xl running this emulator.
If anyone is, without this issue, I'd appreciate it if they could upload their .ini file. Unless of course there is another solution.
Otherwise, hopefully this will be fixed with the next update.
Thanks.
Same problem with my 3DS XL console with NesDS 1.3a. The only "solution" is to use 1:1 native resolution mode, I hope there's an update that fix this issue.
EDIT: After tinkering with my 3DS XL and nesds 1.3a, I found the solution in a silly way, just closing the damn screen in sleep mode and reopening the screen fixed this annoying mirroring issue. I hope huiminghao will fix this in the near future.