What version of filemaker are you using? What version of Windows ? If fm 12, then what theme are you using?
My test with filemaker 12 using the Wave theme, running Windows 7, displays correct. The default line color is gray, but you can change to any color.
You may have to remove all style from the portal, then reapply the style. (At the top of the inspector, under the Apperance tab)
@ S Chamblee, thank you for your input on this
I'm using FM12.0v3 on windows 7, the theme is the classic theme and have this problem both in new files and in converted files.
I also tried your suggestion and removed all styles and set the parameter by hand .... that results in the very same layout, with the very same errors as I started with.
Applying the wave theme does not help
I got the same results that you have with the classic theme, so it must be an issue with that theme and windows. If you Report an Issue at top someone from filemaker will review.