I can not find the release notes on 2.10 firmware. But from www.mydlink.com I was asked to update my firmware. It left 2.10 on one camera, bricked the other two cameras. I have not tried a factory reset on them yet, is it requires some ladder work to reach them. I am very unhappy about that. It also appears that the new video encoding can't be decoded by quicktime, however VLC was able to read it. But the video will no longer display in Safari or Firefox. Even tried H.264 and JPEG, to no avail. The problem I was having with FTP was resolved, though D-Link never admitted to having a problem.
This model camera is making me crazy. My two 5222s seem to work fine.