Right now, the AwesomeScreenshot Safari extension (I use Safari ver. 5.0.5 on my Mac Snow Leopard OS X ver. 10.6.8) only has a PNG image export option. That's too big for my HD; having so many PNG images, while lovely, will kill my memory. I noticed that the PNG/JPG option is currently available to Mozilla Firefox (if I'm not mistaken mine is ver. 5.0) users of AwesomeScreenshot. We hope you can make this a universal feature across all extensions and all browsers. Thank you very much!