I see that an image I posted on the Show Off section, when clicked to view enlarged, has a small "Download" hyperlink posted on the lower left corner... Does posting an image automatically enable downloading... at what resolution?
The dimensions are next to the word download. Definitely not hi-res as the file is only 740 x 740 and 826 KB.
Yes, the image can be downloaded. This actually should not be an automatic feature but rather a choice item by the photo's owner. It can be downloaded at it's original size if not reduced prior to uploading.