I am using WordPress 3.5.1 and NextGenGallery 1.9.13.
When I upload new images the size will be corrected (1280x960) but the quality setting will be ignored. Therefore all images have the correct size but all with 100% JPEG quality.
I downloaded the files and check them with Photoshop and IrfanView. All of them show 100% and they all have a higher file size than expected. For example:
Original: 4000 x 3000px / 180dpi / 100% quality = 2,47Mbyte
NextGen: 1280 x 960 / 180dpi / 100% quality = 1,44Mbyte
NextGen: 1280 x 960 / 180dpi / 50% quality = 1,44Mbyte
IrfanView: 1280x 960 / 180dpi / 50% quality = 84Kbyte (!!!)
Does anybody know, why the quality setting is ignored bei NextGenGallery ?