I usually work with a ltscale of 9 or 10 and a psltscale set to '1'. I am have trouble with "dashed" lines appearing correctly in one group drawings. All the others work normal.
Is there another sys var i can check? i just used a "hidden" line to get around the problem today but things like this always drive you insane if you don't figure it out.
PS--I never change the linetype scale of an individual line. (always set to 1)
Cheers.