It looks as if Mubarak isn't going to be saguine about the Ikhwan's electoral gains. From [1] Reuters, with thanks to Jeffrey Imm:

CAIRO - Egyptian police have detained 1,610 members of the Muslim Brotherhood in the two days before the last stage of voting in parliamentary elections, a Brotherhood spokesman said on Wednesday.

Most of the detentions were in provinces which will vote on Thursday, said Brotherhood spokesman Mohamed Osama. A statement on the arrest of 71 leaders in Dakahlia province said the aim was to thwart the Brotherhood’s election campaign.