Seems like you can duplicate a V5 file with a bitmap and the bitmap copies OK, but if you duplicate a similar V4 file, the bitmap isn’t copied.
For example, create a new file. Place background bitmap pear.bmp (from the tutorial files). Save the file. Duplicate, and everything looks ok. But if you open and duplicate Curve.3dm from the tutorial files (a V4 file), the bitmap shows up as a filled rectangle. Similar results happen with the Chair.3dm file from the tutorial files.
Guess this will only catch V4 users who upgrade to V5, and open V4 files.
p.s. there are two “Duplicate” menu choices on the File menu.
Mac Wenatchee build 470