In Sixto-Clementine Vulgate we find in Genesis this verse:
poenituit eum quod hominum fecisset in terra (Genesis 6:6)
"hominum" is in the genetive case which I find strange. I try searching for the instances where genetive case would be used after verb, and it seems to be related mainly to remember/forgetting verbs.
So I wonder if that's a general practice or I'm missing something in my analysis of the verse.
(by the way, other translations indeed use the accusative case (sometime in singular) in this verse).