I use K2 import component on a K2 2.6.1. I do not have any problem to import but when I try to open an Item I have a:
500 error
"DateTime::__construct() [datetime.--construct]: Failed to parse time string (30-11--0001 00:00:00) at position 0 (3): Unexpected character"

An idea ?

same thing, are you a french user ? I read on the forum that it was a problem with format date.