I am attempting to change the title of a picture on the "edit single image" page, and the Apache log tells me this:

PHP Notice: Undefined index: albumimagesort in /var/www/evc-cit/zenphoto/zp-core/admin-edit.php on line 264, referer: http://evc-cit.info/zenphoto/zp-core/admin-edit.php?page=edit&tab=imageinfo&album=david&singleimage=neon_seoul.jpg

Zenphoto version 1.4.6 [bbddab7675]

Possibly related to this bug?
http://www.zenphoto.org/support/topic.php?id=1292829#post-1834916

Sort of (https://github.com/zenphoto/zenphoto/issues/829). Please try the support build where it is fixed.

Thank you. That seems to have worked (plus the fact that the database tables didn't have any prefix probably didn't help much either).

The database tables don't need a prefix if it does not share the database with anything.