Steps to reproduce:
1. Create an assessment.
2. Edit part, in part Information, Insert/Edit an image using FCK Editor (Browse server and choose an image from your machine and click Upload. Click on that image to add in URL. Click OK in Image Properties box - your image is now created inside Part information box )
3. Try to add images via FCK for Assessment Settings (add images in assessment info) and in question Text.
4. In Edit assessment you will see the image for the part, question. Click Preview, you will see image for assessment.
5. Now, export the assessment.
6. Import back that same assessment.
7. View Edit assessment, you will see the part image is missing while the question image in question text is there, and if you preview assessment, you also can see the image.
So, the assessment image and question image via FCK are fine but part image is missing when export/import.