Previously, you could not erase the camera until copying was completed. Mac OS 8.5 can perform other tasks while copying files so it is possible to accidentally erase the pictures before they have been copied from the camera. You cannot recover a picture once it is erased from the camera.
If you have encountered other issues since installing Mac OS 8.5 please read the About Mac OS 8.5 Read Me and Installing Mac OS 8.5 Read Me that come with Mac OS 8.5.
This information is from Knowledge Base article 58129: "
Mac OS 8.5: About Mac 0S 8.5 Read Me".