While I appreciate a retroactive effort to verify I didn't sign up as a 10-year-old and vote illegally for five years...I registered to vote in 2006. At my polling location. I don't remember if they asked for my date of birth, but it was prominent on the government-issued ID (...an Iowa driver's license) that they asked to see.
And I couldn't possibly have registered to vote here at this address before 2003 because I was living in West Des Moines and, despite a summer of cat-sitting downtown in 1999, had no idea this address even existed.
I like that they're checking databases and whatnot, but if they have bad data for date of registration, what else is bad?