diff -Nru python-qt4-4.10/debian/changelog python-qt4-4.10/debian/changelog
--- python-qt4-4.10/debian/changelog	2013-03-06 17:58:17.000000000 +0100
+++ python-qt4-4.10/debian/changelog	2013-03-29 11:32:10.000000000 +0100
@@ -1,3 +1,10 @@
+python-qt4 (4.10-0ubuntu2) raring; urgency=low
+
+  * backport fix-QTextBlockUserData.patch from upstream snapshot
+    fixes e.g. syntax highlighting in editors
+
+ -- Julian Taylor <jtaylor@ubuntu.com>  Fri, 29 Mar 2013 11:29:21 +0100
+
 python-qt4 (4.10-0ubuntu1) raring; urgency=low
 
   * New upstream release
diff -Nru python-qt4-4.10/debian/patches/fix-QTextBlockUserData.patch python-qt4-4.10/debian/patches/fix-QTextBlockUserData.patch
--- python-qt4-4.10/debian/patches/fix-QTextBlockUserData.patch	1970-01-01 01:00:00.000000000 +0100
+++ python-qt4-4.10/debian/patches/fix-QTextBlockUserData.patch	2013-03-29 11:28:51.000000000 +0100
@@ -0,0 +1,77 @@
+Description: fix QTextBlockUserData losing its data
+Origin: pyqt4 4.10.1 snapshot
+Bug: http://www.riverbankcomputing.com/pipermail/pyqt/2013-March/032457.html
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/python-qt4/+bug/1161818
+Author: phil@riverbankcomputing.com
+
+--- a/sip/QtGui/qsyntaxhighlighter.sip
++++ b/sip/QtGui/qsyntaxhighlighter.sip
+@@ -1,4 +1,4 @@
+-// qsyntaxhighlighter.sip generated by MetaSIP on Fri Mar  1 21:42:08 2013
++// qsyntaxhighlighter.sip generated by MetaSIP on Thu Mar 14 02:48:42 2013
+ //
+ // This file is part of the QtGui Python extension module.
+ //
+@@ -68,7 +68,25 @@ protected:
+     int previousBlockState() const;
+     int currentBlockState() const;
+     void setCurrentBlockState(int newState);
+-    void setCurrentBlockUserData(QTextBlockUserData *data /Transfer/);
++    void setCurrentBlockUserData(QTextBlockUserData *data /GetWrapper/);
++%MethodCode
++        // Ownership of the user data is with the document not the text block.
++        QTextDocument *td = sipCpp->document();
++        
++        if (td)
++        {
++            PyObject *td_obj = sipConvertFromType(td, sipType_QTextDocument, 0);
++        
++            if (td_obj)
++            {
++                sipTransferTo(a0Wrapper, td_obj);
++                Py_DECREF(td_obj);
++            }
++        }
++        
++        sipCpp->setCurrentBlockUserData(a0);
++%End
++
+     QTextBlockUserData *currentBlockUserData() const;
+ %If (Qt_4_4_0 -)
+     QTextBlock currentBlock() const;
+--- a/sip/QtGui/qtextobject.sip
++++ b/sip/QtGui/qtextobject.sip
+@@ -1,4 +1,4 @@
+-// qtextobject.sip generated by MetaSIP on Fri Mar  1 21:42:08 2013
++// qtextobject.sip generated by MetaSIP on Thu Mar 14 02:48:42 2013
+ //
+ // This file is part of the QtGui Python extension module.
+ //
+@@ -193,7 +193,26 @@ public:
+     QTextBlock next() const;
+     QTextBlock previous() const;
+     QTextBlockUserData *userData() const;
+-    void setUserData(QTextBlockUserData *data /Transfer/);
++    void setUserData(QTextBlockUserData *data /GetWrapper/);
++%MethodCode
++        // Ownership of the user data is with the document not the text block.
++        const QTextDocument *td = sipCpp->document();
++        
++        if (td)
++        {
++            PyObject *td_obj = sipConvertFromType(const_cast<QTextDocument *>(td),
++                    sipType_QTextDocument, 0);
++        
++            if (td_obj)
++            {
++                sipTransferTo(a0Wrapper, td_obj);
++                Py_DECREF(td_obj);
++            }
++        }
++        
++        sipCpp->setUserData(a0);
++%End
++
+     int userState() const;
+     void setUserState(int state);
+ %If (Qt_4_4_0 -)
diff -Nru python-qt4-4.10/debian/patches/series python-qt4-4.10/debian/patches/series
--- python-qt4-4.10/debian/patches/series	2013-03-06 17:55:08.000000000 +0100
+++ python-qt4-4.10/debian/patches/series	2013-03-29 11:23:47.000000000 +0100
@@ -2,3 +2,4 @@
 debian_configure_changes.diff
 config_extra_headers.diff
 invisiblerootitem.patch
+fix-QTextBlockUserData.patch