To sbillard
1) Configuring the plugin did the trick. Enough EXIF fields, including tags/keywords, to meet my needs are now read from each file.
2) I did find another anomaly. I tried to upload three files, each between 3 and 4 mb. Zenphoto acted as if it uploaded all three files, but when I looked in the album, only the first two actually had been uploaded. However, I could then separately upload the last file. Is this a bug, or is there a limit on the total size for upload? I'm using Zenphoto on a hosting service.
3) Hoping to allow visitors to download some of my images, I turned on the plug-in downloadList, but when opening my site, I o could not find anywhere to click to perform downloads? Does enabling downloads require some additional effort, such as coding ??
Thanks, Michael