Im using a mac with Aperture and GIMP for processing ..

I have a exif viewer that sits in my dock and if I want to see exif of an image I just drag said image onto the icon in the dock. A thumbnail of the image then pops up with all exif data included.

Problem is, once processed in Aperture, then exported and edited in GIMP and then posted images onto AP, my exif seems to disappear ... The pop up contains only the thumbnail image but no exif ??

Any thoughts on why ??