My friend TurretinFan did some great work a few months ago confirming my suspicion that an oft-used Luther quote by Roman Catholic apologists was the result of Cochlaeus. Now TurretinFan did some work on the saying often attributed to Luther, that justification is like snow which covers dung.
Snow-Covered Dung-Heap - Luther / Langland / Chrysostom?
While the entry is not definitive, it certainly is interesting. In a way, I feel bad for TurretinFan that he can't copyright his efforts with this quote. I'm sure others will seize it, as if they actually found the same tidbits of information.