diff --git a/kdelibs-4.2.1-css.patch b/kdelibs-4.2.1-css.patch
new file mode 100644
index 0000000..ff85d90
--- /dev/null
+++ b/kdelibs-4.2.1-css.patch
@@ -0,0 +1,17 @@
+--- kdelibs/khtml/ecma/kjs_css.cpp	2009/02/07 18:21:18	922888
++++ 4.2/kdelibs/khtml/ecma/kjs_css.cpp	2009/03/09 14:38:22	937328
+@@ -222,12 +222,12 @@
+   CSSStyleDeclarationImpl &styleDecl = *m_impl;
+ 
+   if (propertyName == "cssText") {
+-    styleDecl.setCssText(value->toString(exec).domString());
++    styleDecl.setCssText(valueToStringWithNullCheck(exec, value));
+   }
+   else {
+     bool pxSuffix;
+     QString prop = cssPropertyName(propertyName, &pxSuffix);
+-    QString propvalue = value->toString(exec).qstring();
++    QString propvalue = valueToStringWithNullCheck(exec, value).string();
+ 
+     if (pxSuffix)
+       propvalue += QLatin1String("px");
diff --git a/kdelibs.spec b/kdelibs.spec
index a78961f..81d35a7 100644
--- a/kdelibs.spec
+++ b/kdelibs.spec
@@ -1,6 +1,6 @@
 Summary: K Desktop Environment 4 - Libraries
 Version: 4.2.1
-Release: 4%{?dist}
+Release: 5%{?dist}
 
 %if 0%{?fedora} > 8
 Name: kdelibs
@@ -85,6 +85,7 @@ Patch25: kdelibs-4.2.0-gcc44-misc.patch
 
 # upstream
 # 4.2 branch
+Patch100: kdelibs-4.2.1-css.patch
 
 # 4.3 branch
 Patch200: kdelibs-4.1.96-AllowExternalPaths.patch
@@ -221,6 +222,7 @@ sed -i -e "s|@@VERSION_RELEASE@@|%{version}-%{release}|" kio/kio/kprotocolmanage
 
 # upstream patches
 # 4.2
+%patch100 -p1 -b .css-style
 
 # 4.3
 %patch200 -p1 -b .AllowExternalPaths
@@ -397,6 +399,9 @@ rm -rf %{buildroot}
 
 
 %changelog
+* Mon Mar 09 2009 Than Ngo <than@redhat.com> - 4.2.1-5
+- apply patch to fix issue in CSS style that causes konqueror shows a blank page
+
 * Wed Mar 05 2009 Rex Dieter <rdieter@fedorproject.org> - 4.2.1-4 
 - move designer plugins to main/runtime (#487622)