There are 9 duplicate files in the Windows .zip... these might be due to case sensitivity? - xt_CONNMARK.h - xt_DSCP.h - xt_MARK.h - xt_RATEEST.h - xt_TCPMSS.h - ipt_ECN.h - ipt_TTL.h - ip6t_HL.h When extracting, the files seem to be the same size.