Would you mind explaining what you mean by "It was the line width in the Drafting Properties for the pour outline"?
What makes me nervous about your answer is that sometimes I change the line width for pours so it can do a better job of pouring between features (and not leave "slots" in the plane), but I wouldn't want my pours to be hatched.
Why wouldn't a smaller line width cause the pour to draw the lines closer together, instead of leaving gaps?