We finally made the leap from analog to digital photography, and have started our period of adjustment. We bought an Olympus D-580. I haven’t found anything to complain about, yet, but give me time. The shutter is sluggish in low-light situations; I understand this is a problem with all digital cameras.
When I transferred the pictures to our iMac, with iPhoto, I chose to “delete images from camera after transferring.” Half were transferred successfully, and all were deleted successfully. This was not good. It appears that the cause of failure was a full disk. Looks like iPhoto needs to catch a disk full error.
Anyway, Rick Ochoa reminded me that there are photo recovery utilities, so I quickly bought and used PhotoRescue. There are lots of choices out there, but this seems to work well enough.