Bug report. kdegraphics 3.0.4-1 depends on kamera 3.0.4-1, which depends on libexif5. libexif5 has been replaced by libexif7 in sid and is currently only in testing and stable. I don't know whether this is still true for 3.0.5. download.us.kde.org still has the 3.0.4 packages as latest.