diff --git a/debian/NEWS b/debian/NEWS
index 50332670f..afb3a8652 100644
--- a/debian/NEWS
+++ b/debian/NEWS
@@ -1,3 +1,13 @@
+ikiwiki (3.UNRELEASED) UNRELEASED; urgency=low
+
+  Starting from this version, the tagged(x) pagespec only matches links that
+  were set up by the [[!tag]] or [[!taglink]] directives. To make this change,
+  all wikis need to be rebuilt on upgrade to this version. If you listed your
+  wiki in /etc/ikiwiki/wikilist this will be done automatically when the
+  Debian package is upgraded. Or use ikiwiki-mass-rebuild to force a rebuild.
+
+ -- Simon McVittie <smcv@debian.org>  Tue, 06 Apr 2010 20:53:07 +0100
+
 ikiwiki (3.20091017) unstable; urgency=low
 
   To take advantage of significant performance improvements, all
diff --git a/debian/postinst b/debian/postinst
index bf1825ab7..90b9e8a42 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -4,7 +4,7 @@ set -e
 
 # Change this when some incompatible change is made that requires
 # rebuilding all wikis.
-firstcompat=3.20091010
+firstcompat=3.20100401
 
 if [ "$1" = configure ] && \
    dpkg --compare-versions "$2" lt "$firstcompat"; then