getting 404s for some images

[afeld]

e.g. https://s3.amazonaws.com/craj_biznesses_pics/4a3aa8380f4452af4d6e56e848dd083162838453Screen%2BShot%2B2012-11-29%2Bat%2B3.07.02%2BAM.png

response is fine in browser - thought it might be a UA-string issue but HEAD request is fine in cURL...