what kind of camera do you have? Does this problem happen after every single import? If you import, say, 20 pictures from your camera and then select Last Import from the sidebar, does it show almost all the pictures (say, 18 or 19), or just a few? Are you importing only JPEG photos, or RAW photos as well? Do you notice any pattern in the photos which fail to appear in Last Import? For example, are those the latest photos you took with the camera, or the earliest?
Jim,
what kind of camera do you have? Does this problem happen after every single import? If you import, say, 20 pictures from your camera and then select Last Import from the sidebar, does it show almost all the pictures (say, 18 or 19), or just a few? Are you importing only JPEG photos, or RAW photos as well? Do you notice any pattern in the photos which fail to appear in Last Import? For example, are those the latest photos you took with the camera, or the earliest?