Hello again. I successfully installed ZP 1.15, everything worked out as expected. I went back this morning to set up some albums and load photos.
When I created a single album and uploaded a test photo, added the various text details, and hit "Save," I got the dreaded server error 500. I am pretty sure that my .htaccess is set properly, and both the album and cache folders are set to 777 for permissions.
What have I forgotten?