kilroy and others mentioned receiving
`
Notice: Bad image name suffix in newImage() in /home/imhotep/www/zp-core/class-image.php on line 47
...
Warning: Cannot modify header information - headers already sent by (output started at /home/imhotep/www/zp-core/class-image.php:47) in /home/imhotep/www/zp-core/admin-edit.php on line 362
`
I got the same trying to apply changes I had made to images in any album of size larger than 4.
It turned out, that the reason was the size of $_POST[] array passed to the admin-edit.php script.
Default settings of my server limit it to 200 elements. However, submitted 'albumedit2' form sends much more data to the server. Script receives correct info about the number of images it should process, but only part of the image details (in my case, it was truncated somewhere in the middle of the 5th image data). In $_POST[] array there is no data for '5-filename', '6-filename', ..., 'n-filename' keys, and one gets 'Bad image name' error. Overriding server limits solves the problem.