Hi,
Captions: There doesn't seem to be a way to add a caption or title to your own photo ... just a comment. Wasn't that available before?

Flags: Is it not possible to unflag something if you flag it by accident? I remember a post by Voltaggios saying we should flag things as cool, but now the flag thing designates the photo as "Inappropriate" ... and I couldn't unflag it (deflag? :) ), I had to delete the photo and reupload it.

Submit: What does the Submit This Photo option actually do? Is it negative or positive? I'm not sure what Submit for Review means.

Thanks for any clarification on these issues.
All the best.