Early versions of the ZA software added extra bytes to downloads. If the download was a ".zip", those extra bytes are not a problem. But if the download was a ".ztd", like for the No Egg Hack, that is a problem. As ZA changed web hosts over the years, the ".ztd" was put in a ".zip", but it was a ".ztd" that was downloaded using the older ZA, so it has the extra bytes. Yes, it would be good if someone from ZA rezipped the ".ztd" and replaced their download with it.