diff -Nru kadu-0.11.1/debian/changelog kadu-0.11.1/debian/changelog
--- kadu-0.11.1/debian/changelog	2012-02-28 08:19:06.000000000 +0100
+++ kadu-0.11.1/debian/changelog	2012-04-05 11:06:59.000000000 +0200
@@ -1,3 +1,12 @@
+kadu (0.11.1-3) unstable; urgency=low
+
+  * Backported the following fix of kadu_completion plugin from upstream
+    repository:
+    git://gitorious.org/mime_tex/kadu_completion.git
+    The backported commit's fix: dfa94a16d3ff51e9bc05996836e4d46627d93d84
+
+ -- Patryk Cisek <patryk@debian.org>  Wed, 04 Apr 2012 15:15:58 +0200
+
 kadu (0.11.1-2) unstable; urgency=low
 
   * Fixed serious mistake in changelog entry for 0.11.1-1:
diff -Nru kadu-0.11.1/debian/patches/05-kadu_completion_fix.patch kadu-0.11.1/debian/patches/05-kadu_completion_fix.patch
--- kadu-0.11.1/debian/patches/05-kadu_completion_fix.patch	1970-01-01 01:00:00.000000000 +0100
+++ kadu-0.11.1/debian/patches/05-kadu_completion_fix.patch	2012-04-05 11:06:59.000000000 +0200
@@ -0,0 +1,32 @@
+Description: Fixes crash in kadu_completion plugin
+ Backported bug fix from upstream introduced in commit:
+ 22114011400000209167001001. The repository is here:
+ git://gitorious.org/mime_tex/kadu_completion.git
+Author: Patryk Cisek <patryk@debian.org>
+---
+diff --git a/externalplugins/kadu_completion/completion_context.cpp b/externalplugins/kadu_completion/completion_context.cpp
+index 7069aaa..521659b 100644
+--- a/externalplugins/kadu_completion/completion_context.cpp
++++ b/externalplugins/kadu_completion/completion_context.cpp
+@@ -16,6 +16,7 @@ KaduCompletion::CompletionContext::CompletionContext(const KaduCompletion::Emoti
+     else {
+         connect(edit, SIGNAL(keyPressed(QKeyEvent*,CustomInput*,bool&)),
+                 this, SLOT(keyPressed(QKeyEvent*,CustomInput*,bool&)));
++        connect(edit, SIGNAL(destroyed()), this, SLOT(deleteLater()));
+     }
+ }
+ 
+diff --git a/externalplugins/kadu_completion/kadu_completion.cpp b/externalplugins/kadu_completion/kadu_completion.cpp
+index d4286ee..c031b5a 100644
+--- a/externalplugins/kadu_completion/kadu_completion.cpp
++++ b/externalplugins/kadu_completion/kadu_completion.cpp
+@@ -36,7 +36,8 @@ void KaduCompletion::KaduCompletion::destroyInstance() {
+ }
+ 
+ void KaduCompletion::KaduCompletion::chatWidgetCreated(ChatWidget *chatWidget) {
+-    new CompletionContext(_list, chatWidget->edit());
++    CompletionContext *newContext = new CompletionContext(_list, chatWidget->edit());
++    connect(this, SIGNAL(destroyed()), newContext, SLOT(deleteLater()));
+ }
+ 
+ KaduCompletion::KaduCompletion::KaduCompletion() {
diff -Nru kadu-0.11.1/debian/patches/series kadu-0.11.1/debian/patches/series
--- kadu-0.11.1/debian/patches/series	2012-02-28 08:19:06.000000000 +0100
+++ kadu-0.11.1/debian/patches/series	2012-04-05 11:06:59.000000000 +0200
@@ -2,3 +2,4 @@
 02-external-plugins.patch
 03-about-dialog.patch
 04-lowered_expectant_libgadu_version.patch
+05-kadu_completion_fix.patch