I installed civil 3d 2015 this morning and inserted a SID image to see if the image would shift in the viewport. Sure enough it did shift and it did not matter if the viewport was rotated or not. Whenever I would zoom in or out the image would shift off of the line work. Also when I inserted the image with raster design, it came in at the wrong location. Any thoughts?
Some links to check out.
See if you think it sounds like the same thing.
http://forums.augi.com/showthread.php?131991-sid-ecw-image-shifting-in-paperspace-vs-model-space
http://forums.augi.com/showthread.php?96259-Large-SID-image-file-plus-Dview-angle-causing-problems
http://forums.autodesk.com/t5/AutoCAD-Map-3D-General/Mr-Sid-Image-Shifting/td-p/3876602