thanks for this great plugin. Exactly what I needed to solve an occasional issue we have with a double post from importing news from one of our sites to our main portal with an automation system - every week or so we have one item that skips and duplicates and we get 2 copies of same post that are 100% identical. Obviously Google wasn't happy with that, and trashing one of them caused problems if Google had captured the other, and Google News had the other one (argh!). So, this (first time used it today)... was perfect solution.
Should be a built-in function, at some point. ;-)