diff -r dee5afe5301f -r 3f74d0d4af4c src/gui/text/qfontdatabase_s60.cpp
--- a/src/gui/text/qfontdatabase_s60.cpp	Mon Mar 15 12:43:09 2010 +0200
+++ b/src/gui/text/qfontdatabase_s60.cpp	Thu Apr 08 14:19:33 2010 +0300
@@ -246,8 +246,8 @@
     QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);
     
     const int numTypeFaces = QS60Data::screenDevice()->NumTypefaces();
-    const QFontDatabaseS60StoreImplementation *store = dynamic_cast<const QFontDatabaseS60StoreImplementation*>(db->s60Store);
-    Q_ASSERT(store);
+    const QFontDatabaseS60StoreImplementation *store =
+            static_cast<const QFontDatabaseS60StoreImplementation*>(db->s60Store);
     bool fontAdded = false;
     for (int i = 0; i < numTypeFaces; i++) {
         TTypefaceSupport typefaceSupport;
@@ -258,8 +258,7 @@
             continue;
         if (font->TypeUid() == KCFbsFontUid) {
             TOpenFontFaceAttrib faceAttrib;
-            const CFbsFont *cfbsFont = dynamic_cast<const CFbsFont *>(font);
-            Q_ASSERT(cfbsFont);
+            const CFbsFont *cfbsFont = static_cast<const CFbsFont *>(font);
             cfbsFont->GetFaceAttrib(faceAttrib);
 
             QtFontStyle::Key styleKey;
@@ -333,6 +332,11 @@
     return false;
 }
 
+bool QFontDatabase::removeAllApplicationFonts()
+{
+    return false;
+}
+
 bool QFontDatabase::supportsThreadedFontRendering()
 {
     return false;
@@ -390,8 +394,8 @@
         QFontDef request = req;
         request.family = fontFamily;
 #if defined(QT_NO_FREETYPE)
-        const QFontDatabaseS60StoreImplementation *store = dynamic_cast<const QFontDatabaseS60StoreImplementation*>(db->s60Store);
-        Q_ASSERT(store);
+        const QFontDatabaseS60StoreImplementation *store =
+                static_cast<const QFontDatabaseS60StoreImplementation*>(db->s60Store);
         const QFontEngineS60Extensions *extension = store->extension(fontFamily);
         fe = new QFontEngineS60(request, extension);
 #else