According to initial reports, because Band Brothers DX uses a 1mb save instead of traditional 512kb saves, the ROM refuses to load on many flashcarts. Of course, determined delinquents have already found a workaround, and some flashcarts will load the ROM successfully without any required hacking, but pirates are also finding themselves unable to access the 200 downloadable songs available through the Nintendo Wi-Fi Connection.
Seeing as the game comes with only 30 tracks installed, the online songs are a huge draw for people playing Band Brothers DX! Though we expect hackers and flashcart manufacturers to fully "patch" the ROM in a few days, if not in a few hours, it's nice to hear that there are still a few things out there capable of temporarily flummoxing the DS piracy scene.
Gallery: Band Brothers DX