post #1487853 Seiga
post #1487170 Pixiv
post #1490587 Seiga
post #1490593 Pixiv
Between the Seiga and Pixiv versions, there are no changes. They are exactly same image, except in one area: filesize. I had recently been wondering why the filesize between Hammer's works from pixiv and seiga were different, so I finally decided to test it.
I created 3 different images and uploaded them to pixiv and compared their filesizes between my harddrive, seiga and pixiv. On all three images, the size of the file from my harddrive and seiga were exactly the same, but on pixiv it was reduced.
Another example:
http://seiga.nicovideo.jp/seiga/im3367161
http://nijie.info/view.php?id=58303
http://www.pixiv.net/member_illust.php?mode=medium&illust_id=37980257
All three uploaded with minutes of each other, there are no revisions or such between them, but the pixiv version has a slightly reduced filesize.
I have no idea if this problem happens 100% of the time, but I'm sure this only started recently since I've run into dupe errors when uploading from nijie/seiga in the past.
This is, of course, extremely annoying since it can and has lead to duplicates. I don't think many people here will actually care and there's really not a whole lot we can do about it, but like with the situation with twitpic I posted before(topic #8811), I thought I'd at least make a post exposing the issue.
Updated