Question on https://bugs.kde.org/show_bug.cgi?id=372160
I reported this to KDE some time ago, and am following up, because I still experience the bug, which is that size no longer shows in the info panel about images. File size is reported, but not the actual size of the image.
One developer said that Dolphin was not responsible, because "the metadata is provided by kfilemetadata, which needs to be built against exiv2. Make sure this is the case and report back, please."