german:
(Die 3 MB pro JPEG-Bild sind PHP völlig egal, intern wird mit Pixelbreite * Pixelhöhe * 3 Byte gerechnet. Bei 7 Megapixel z.B. wird also für die Verarbeitung 21 MB PHP-Speicher benötigt!)

It says:

The size of the image is not important.
PHP checks the resolution of the image and tries to allocate memory like this:

IMG_WIDTH * IMG_HEIGHT * 3 bytes

Ex: 7 Megapixel needs 21 MB

– hmm –

I have this problem at 1und1 webhosting and images like 700kb and 2000 x 1500 px wont be thumbed. I have php5 and ini_set enabled in the gd-script.
PHP Version : 5.2.12
GD Version : bundled (2.0.34 compatible)
# PHP Memory Limit : 40M
# PHP Max Upload : 20M
# PHP Max Post : 8M
# PHP Output Buffer : N/A
# PHP Max Script Execute Time : 50000s

mem_usage on ngg-dash 17.34 MByte

Images with 1024×768 px work perfect.

– In the end I have no clue :-] –

I hope someone will find a solution for this.

tx again for this nice plugin

Is there problem of PHP memory?
As on admin blog it works fine n on the other user blog it gives failure