2 BIOS files posted in 1 day?

ftp://ftp.asus.com.tw/pub/asus/mb/so...eluxe/0404.zip
ftp://ftp.asus.com.tw/pub/asus/mb/so...eluxe/0501.zip

the 0501 Bios is only 1MB, where 0404 is 2MB.

Any ideas?