I have just upgraded from SW 2012 version to 2014, and I thought these sort of problems were a thing of the past.
A hidden detail line of a component in an assembly shows up as solid as if it's two overlapping or coincidental lines, see image.
An attempt to right click a line and hide it just removes the solid line and leaves a dashed line only, even where it should be solid. There is no option to select other.
The part is a sheet metal channel seen from the side, partially masked by a web, see other image for a 3d view.
Can anyone help with this?