diff -up qt-x11-opensource-src-4.5.3/src/3rdparty/webkit/WebCore/html/HTMLParser.cpp.cve-2010-0050-crash-misnested-style-tags qt-x11-opensource-src-4.5.3/src/3rdparty/webkit/WebCore/html/HTMLParser.cpp
--- qt-x11-opensource-src-4.5.3/src/3rdparty/webkit/WebCore/html/HTMLParser.cpp.cve-2010-0050-crash-misnested-style-tags	2009-09-29 13:01:36.000000000 +0200
+++ qt-x11-opensource-src-4.5.3/src/3rdparty/webkit/WebCore/html/HTMLParser.cpp	2010-02-04 15:54:25.399651321 +0100
@@ -1208,7 +1208,8 @@ void HTMLParser::handleResidualStyleClos
             prevMaxElem->next = elem;
             ASSERT(newNodePtr);
             prevMaxElem->node = newNodePtr;
-            prevMaxElem->didRefNode = false;
+            newNodePtr->ref();
+            prevMaxElem->didRefNode = true;
         } else
             delete elem;
     }