Found under the "Click to add tags" where the Add Comments normally appear on the Image Page; Admin-mode:

Fatal error: Call to undefined function printimagemap() in /...../themes/defaultBoston/image.php on line 66. Not seen in any previous viewing of album. Last viewed about 4 days ago.

Line 66 might be:

My modification was to comment out the EXIF information as per a request I made long ago that appears just above the lines quoted above:

Are you running on a recent nightly build? It is possible that you have disabled the google_maps plugin. The new code for line 66 reads ``

Running 01 April build. I updated the files. Don't know nothin' about Google maps plugin yet. So not touched.

I have a modified images.php so have made copy to keep track of what I've commented out so I can search updated copies to repeat.

All better, thanks.