Flashing latest LSDJ versions fails

[naught101]

When I flash the latest versions of LSDJ using ems-flasher, it appears to work, but then when I try to load on a Gameboy Pocket, it fails. Here is some command line output:

$ ./ems-flasher-0.03/ems-flasher --verbose --write lsdj.gb --bank 1
trying to find EMS cart
claimed EMS cart
base address is 0x0
Writing ROM file lsdj.gb
Successfully wrote 1048576 from lsdj.gb
$ ./ems-flasher-0.03/ems-flasher --title --verbose             
trying to find EMS cart
claimed EMS cart
base address is 0x0
Bank 0: LSDj-v5.3.5�
Hardware support: DMG <+CGB>
Cartridge header checksum invalid. This game will NOT boot on real hardware.
1024 KB ROM
Bank 1: LSDj-v5.3.5�
Hardware support: DMG
Cartridge header checksum invalid. This game will NOT boot on real hardware.
1024 KB ROM

I'm not sure what's going wrong. I don't yet have any other hardware to try this on. Is there anything else I can try, or info I can provide?