A possible solution well it worked for me.......
I always reload, mark all upgrades, apply, apply
Always fully updated, KDE 32 bit
Ive been with this distribution since just after it started, learnt my lessons

A few minutes ago I did another update etc and got the same unresolved dependencies
digikam:
Depends: kipi-plugins
Depends: libdigikamcore.so.3
Depends: libdigikamdatabase.so.3
Depends: libkdcraw.so.22
Depends: libkipi.so.10
Also there were two that wouldn't upgrade - libkface & opencv
the missing dependencies were
libkface:
Depends: libopencv_calib3d.so.2.4
Depends: libopencv_contrib.so.2.4
Depends: libopencv_core.so.2.4
Depends: libopencv_features2d.so.2.4
Depends: libopencv_flann.so.2.4
Depends: libopencv_highgui.so.2.4
Depends: libopencv_imgproc.so.2.4
Depends: libopencv_legacy.so.2.4
Depends: libopencv_ml.so.2.4
Depends: libopencv_nonfree.so.2.4
Depends: libopencv_objdetect.so.2.4
Depends: libopencv_photo.so.2.4
Depends: libopencv_stitching.so.2.4
Depends: libopencv_ts.so.2.4
Depends: libopencv_video.so.2.4
Depends: libopencv_videostab.so.2.4
and when it came to opencv it required
openshot and frei0r-plugins to be uninstalled so I did and now
Digikam 3.0.0 is installed