This can also be an indicator of a faulty printer driver. You might update
your printer drive to see if that fixes the problem.
Something else to check is the "Do full justification like WordPerfect 6.x
for Windows" setting under Tools - Options - Compatibility. Also, you might
check File - Print - Properties to see if your printer has a funky setting
that might be producing what you're seeing. Another Tools - Options -
Compatibility that might conceivably be related is "Set the width of a space
like WordPerfect 5.x:"