@R. Sinclair – how did you place that EPS file?
"Show Import Options" on or off?
Make sure, that the EPS file is rasterized for display by InDesign and not using its own embedded preview.
One benefit is the superior display quality and the other is that the EPS is parsed through the import filter where problems with the file could be detected early on.
To do that:
1. Check "Show Import Options" when the place command is showing you the file window where you can choose a file to place.
2. In the "EPS Import Options" check: "Rasterize the PostScript" in the next dialog.
Hope that makes the difference…
@Bob Levine: Thanks, using an .AI version helped. It displays correctly at all magnifications. Unfortunately a lot of the art I use are legacy master files supplied by corporate clients in EPS format, and we can't (or at least shouldn't) always change the file format manually to AI.
@Laubender: Great suggestion. I double-checked my Import Options, and tried selecting "Rasterize the Postscript" when reimporting an EPS file, but unfortunately it exhibited the same greeking behavior.
@Bob, strange, I've always had perfect, smooth previews of EPS vector art at all magnification levels in previous versions of InDesign CS. I remember that was one of the winning factors for InDesign over QuarkXPress, and I've never seen this greeking behavior until my new installation of CS6.