Version: svn 20070524 (using KDE Devel)
Installed from: Compiled sources
1)have the exif and iptc information together in one list.
2)Make the fields shown in the list customizable
3)show the selected fields (maybe as an option) even if they are not set/doesnt exist in the image.
This item is more or less the same as bug #135851.. but that one is closed ("solved") already.
For the point 1/, i'm not agree. This will bloat the gui. ALso digiKam for KDE4 support Xmp metadata. You have again a new sidebar tab...
Point 1/ => will never be implemented.
Point 2/ look http://bugs.kde.org/show_bug.cgi?id=126086
Point 3/ => will never be implemented. There is a search text bar to filter metadata now.
*** This bug has been marked as a duplicate of 126086 ***
Fixed with #126086