Today, we released a fix that corrected an issue incorrectly put the value of 01/01/1970 as the result of Min/Max equation instead of the expected Min or Max date.
We also corrected an issue relating to multi-select fields that resulted in alphabetical sorting to be ABCabc (Apple, Banana, Carrot, apple, banana, carrot) instead of the expected: AaBbCc (Apple, apple, Banana, banana, Carrot, carrot).
Cheers,
Kara
Thanks for the update 
Does this also fix the bug where calculated null or 0 values are being set to 01/01/1970 for dates?
checking!
I opened a ticket with Ally. It appears that this is now a “feature” that blank date values in equations are represented as 01/01/1970. This breaks several of our formulas now for leaving Date Fields blank. Visually the equation shows the value as blank but the Date field does not. There is clearly disjointed display rules and logic for these fields (equations & dates). The default 01/01/1970 date should not apply unless we specify the field to use its default value. A Default value should not be represented the same as a Blank/Null value.
Thanks - will check on this
