I know why the Dalek's message was just "EXTERMINATE" over and over.

Dalek Fred tried to record the original, chilling message of subjugation, but the other Daleks noticed that cockroaches had come from Earth and invaded the Crucible in retaliation. So all of them started frantically killing the roaches, shouting "EXTERMINATE!! EXTERMINATE!! EXTERMINATE!!" while completely drowning out Fred's message.

Thankfully, he managed to kill The Doctor, giving himself moments of extreme pride before being killed by Jack.

Hi guys, i was just wondering... when Donna was sitting on the stairs at the Shadow Proclemation, the woman said to her that there was something on her back... does that mean that we may be seeing more of Donna? or am i missing something important here :)

I believe she said there was something on her back -- past tense.

ohhhhh... that would explain it then :D thanks :)