Comment 4 for bug 172780

Well, Carlos' point is that a string would not be translated in Launchpad (thus, not included in rosettaCount), yet translated upstream (and included in currentCount). So, a string which is not really translated is now counted as translated by a mere addition of rosettaCount and currentCount, and translatedCount ends up being 1 larger than it should be.

It sounds very likely that this is a problem in current RosettaStats code.