🚀 go-pugleaf

Hi. This is my first time posting here, so I apologize if I inadvertently violate any standard practices, or if I have somehow overlooked a previous posting that addresses this issue. We upgraded from FrameMaker 6.0 to FrameMaker 7.0 about a month ago. (We are operating on the Windows NT 4.0 platform.) Today, I began updating some year-old files and noticed that several imported graphics now have what look like vertical ruler marks along the right-hand border (of the graphic, not the anchored frame itself). These graphics are TIFFs that have not been changed in any way for 2 years; the ruler marks do not appear when the source graphic files themselves are viewed in a graphic editing program. Re-importing the graphic makes no difference, even when the graphic is imported into a new frame. These unwanted ruler marks are present when the page is viewed at different magnification and also when it is printed. Could this problem be the result of some sort of a preference or other setting that might be different in FM 7 than in FM 6, or that might need to be set for the first time? Any ideas on how to make these little lines go away? Why have they appeared in some graphics, but not in others? We're stumped.