Gah, I love this game but I've just put together a consistent solution for a puzzle (the dragon one) that isn't apparently right... but it looks almost right... and it's driving me nuts.
Wolf is another one with multiple solutions based on the numbers. Can guess correctly by assuming certain things are symmetric, but I managed to draw something plausible that fit the numbers and still got it "wrong".
I fell down at the beginning of a level, in an area where you can't just wall-jump back up. It now seems to be impossible to backtrack up there during the second part, because a clone will fall past as I go the long way to climb back up.
 "Picma"){kind=icon}
 "Japanese Nonograms"){kind=icon}
 "One Step Back"){kind=icon}
 "Super Karoshi"){kind=icon}