Have you verified the proper path to jpegtran is entered in global options in admin? Have you made sure the setting to extract exif is set to yes under upload options in admin. Nothing really has changed too much on the exif extraction from photos in a very very long time. have you verified jpegtran is actually installed on the server? Servers do change and get updated.
Cordoba, Argentina - Galeria de arquinauta.com
It seems to me your exif has not worked in a long time. I dont really see any exif on any photo past the one I show here so your last 3000 images I am not seeing exif info.