I have noticed this on quite a few routes.
In what way does min/max date params differ from fromdate/todate?
Edit
Actually when I look at it closer, the min/max say that they are context sensitive to the sort type.
How is a date min/max valid when sorting by, for instance votes?
Is this an oversight? I am assuming so when I change the tag to [bug].
Feel free to correct me if I am mistaken or missing something.