Apple Ipod Touch 2nd Gen 8gb>7gb???

Ok its as plain as this. I plug my ipod into the pc, register at the apple site, and notice that my 8gb has 7 gb total capacity. I know that sometimes, a 2 gb flash drive might become around 1.8gb or so but losing 1 gb of 8gb is just ridiculous. Maybe some1 could help me with this problem? They should've just put it as Ipod Touch 2nd Gen 7 gb -__-.

Thanks for reading and sharing ur time with me, and I hope u can help me solve my problem, or atleast explain why I got a lower storage than I bargained for. Thanks again.