[Discuss] Peculiar JPEG Image behaviour -- Off Topic?

[pw]

Murray Strome wrote:
> The background in these images is still large; the 
> images are  960X1280 but the background is 171MB which seems 
> ridiculous!  I am not sure where GIMP gets this information, or how it 
> is used -- but such huge backgrounds sure do slow down the loading and 
> saving!
> 
> Murray


Does the mac put an alpha channel into the jpeg?
Your 'background' may be a alpha channel.

Does gimp handle alpha mask for jpeg?
Is gimp using the same libjpeg that the other
applications are using?
Maybe it's statically compiled with an older libjpeg.

Peter