We might be back to the state of affiars of having to keep John Kerry and Bob Kerrey straight if Kerrey wins back his old Nebraska senate seat. He's been off in New York City (get a rope) for the last decade running the New School and is using his sister's house as his official NE digs.
Where you were the day you filed isn't an issue, thus the nit-pick that he was in a hotel that day rather than his sister's house shouldn't be decisive. I could be up visiting my sister's cottage in northern Michigan and still be a legal resident in Midland.
Given the lay of the land, Kerrey shouldn't give up his day job too quickly; even as a somewhat straight-shooting liberal who'll buck the party line when called for, he might be hard-pressed to win in a seriously red state. Ben Nelson retired rather than try and hang on to this seat, and Kerrey will be seen as less in touch with the average Nebraska voter on the issues than the more moderate Nelson.
That being said, Kerrey's independent streak will win over swing voters and was nice to have in the Senate, as he occasionally was a Democrat that conservatives could do business with. Those are few and far between these days, but Nebraska is more likely to pick a conservative who votes that way most of the time rather than some of the time.