Good suggestion. Attached is an upgraded nmudiff.
diff -Nru digikam-2.6.0/debian/changelog digikam-2.6.0/debian/changelog
--- digikam-2.6.0/debian/changelog 2012-06-10 05:01:29.000000000 +0000
+++ digikam-2.6.0/debian/changelog 2014-11-15 15:33:17.000000000 +0000
@@ -1,3 +1,11 @@
+digikam (4:2.6.0-1+deb7u1) stable; urgency=low
+
+ * Non-maintainer upload.
+ * Add versioned Breaks/Replaces on digikam-doc, that fixes the Squeeze to
+ Wheezy upgrade. (Closes: #767570)
+
+ -- Jean-Michel Nirgal Vourgère <jmv_...@nirgal.com> Sat, 15 Nov 2014 11:02:12 +0000
+
digikam (4:2.6.0-1) unstable; urgency=low
* New upstream release
diff -Nru digikam-2.6.0/debian/control digikam-2.6.0/debian/control
--- digikam-2.6.0/debian/control 2014-11-15 07:15:37.000000000 +0000
+++ digikam-2.6.0/debian/control 2014-11-15 11:01:51.000000000 +0000
@@ -96,6 +96,8 @@
Architecture: any
Depends: ${shlibs:Depends}, ${misc:Depends}, digikam (= ${binary:Version})
Recommends: dolphin, kipi-plugins
+Breaks: digikam-doc (<< 2:2.0.0-1~)
+Replaces: digikam-doc (<< 2:2.0.0-1~)
Description: image viewer/editor for KDE
showFoto is the standalone image editor of the digiKam project.
.
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