NGG 1.9.12, PHP 5.3.21, MySQL 5.1.67
Firefox 19, latest Chrome, IE9 or 10
1) We're unable to edit Thumbnails - just get a solid black square.
2) All images upload with a time stamp of 1970. Local computer time is correct, server and WordPress time appears correct and images carry correct time/date meta data from camera.
The plugin appears to be full functional with the exception of the "clue" below. I've fully uninstalled and re-installed (using a backup of the NGG database tables which kinda defeats the purpose) and have disabled/re-enabled the plugin several times. Any help appreciated!
Only clue - if I run "Create new URL friendly image slugs" I get two error lines at the top of the page:
Warning: include_once(/home/name/public_html/wp-content/plugins/nextgen-gallery/admin/upgrade.php) [function.include-once]: failed to open stream: No such file or directory in /home/name/public_html/wp-content/plugins/nextgen-gallery/admin/settings.php on line 201 Warning: include_once() [function.include]: Failed opening '/home/name/public_html/wp-content/plugins/nextgen-gallery/admin/upgrade.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/name/public_html/wp-content/plugins/nextgen-gallery/admin/settings.php on line 201