I've been using Jason's version. I'll try again to make sure, but I don't think that's the problem. I'll edit with results in like ten minutes.
EDIT: Still failed. I recognize the latter version though, that's the one I used before. Gimme a bit to try that one.
EDIT2: The latter one is working for some reason. It's mid-writing. Using the SDHC option gave an error as well, but on a hunch I tried the others; R4i Gold worked. I'll give results after.
EDIT3: I'm confused. It's saying the writing is done, but then it goes back to the flasher menu where it tells you that you can either inject, restore, or change cartridge. If I go home, the flashcart still shows up on the home menu, and inputting my microSD lets it work as normal. Any ideas?