02/15/2012 - One in eight U.S. voter registrations is invalid or markedly inaccurate, the result of an outdated and inefficient registration system, a Pew Center on the States report said on Tuesday.

More than 1.8 million dead people are listed as active U.S. voters, and about 2.75 million people have active registration in more than one state, according to the research by the non-partisan think tank.

U.S. electoral systems "are plagued with errors and inefficiencies that waste taxpayer dollars, undermine voter confidence, and fuel partisan disputes over the integrity of our elections," the report said.

Read the full article at reuters.com.