Traceable = due to
Subtle = hard to detect, small
In other words - 'Even some of the misunderstandings that occur between men and women in the same culture are due to small, culturally influenced differences in their communication patterns.
I think an example could be that if a woman was talking to some of her girl friends and said something sarcastically or as a joke, if she had said that to a man, it would have been misinterpreted and might have caused offense.
- For Teachers