About the screenshot attached in comment #4: inkscape normally doesn't open fullscreen with the EPS file - the content is zoomed to fit a smaller (default-sized?) window, see attached screenshot [1] with current trunk.
Does it help if you toggle on the sticky zoom (upper right corner of the canvas, or 'Inkscape Preferences > Windows > Miscellaneous: [x] Zoom when window is resized) and reopen the EPS file in a new window?
[1] note that current trunk versions and 0.48.x set the page size to the bbox of the imported EPS file, and no longer to the default paper size used by Ghostscript.
About the screenshot attached in comment #4: inkscape normally doesn't open fullscreen with the EPS file - the content is zoomed to fit a smaller (default-sized?) window, see attached screenshot [1] with current trunk.
Does it help if you toggle on the sticky zoom (upper right corner of the canvas, or 'Inkscape Preferences > Windows > Miscellaneous: [x] Zoom when window is resized) and reopen the EPS file in a new window?
[1] note that current trunk versions and 0.48.x set the page size to the bbox of the imported EPS file, and no longer to the default paper size used by Ghostscript.