[kabwj]

No indication of what it means. Has anybody tried to download the same picture from two accounts and see if the data changes? Maybe this is some data they embed into the picture for bookkeeping when inside their infrastructure and they forget to strip it when they let you download it.

[mattigames]

Nah, is extremely useful for them to know when a picture is being re-uploaded so I dont believe for a second they "forgot to strip it"