Image Upload

This is an image upload test. There's a BHF query: Is there a picture size limit when uploading? The uploaded picture is 2,304px x 3,072px and is 543kb. I selected "large", using the old editor (good), and the image scaled to 300px x 400px for the post. The full size image, as saved by Blogger/Picasaweb, is 1,200px × 1,600px and 196kb. All of that is normal and what I expect. When I change the numbers to /s800, width:600px, height:800px, the image scales up, and that's the current size.