diff -r 41300fa6a67c -r f7bc934e204c src/script/bridge/qscriptclassobject.cpp
--- a/src/script/bridge/qscriptclassobject.cpp	Tue Feb 02 00:43:10 2010 +0200
+++ b/src/script/bridge/qscriptclassobject.cpp	Wed Mar 31 11:06:36 2010 +0300
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
@@ -226,7 +226,7 @@
     QScriptClass *scriptClass = static_cast<ClassObjectDelegate*>(delegate)->scriptClass();
 
     QScriptEnginePrivate *eng_p = scriptEngineFromExec(exec);
-    //JSC::ExecState *oldFrame = eng_p->currentFrame;
+    JSC::ExecState *oldFrame = eng_p->currentFrame;
     eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);
     QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);
 
@@ -234,6 +234,8 @@
     QScriptValue result = qvariant_cast<QScriptValue>(scriptClass->extension(QScriptClass::Callable, qVariantFromValue(ctx)));
     if (!result.isObject())
         result = defaultObject;
+    eng_p->popContext();
+    eng_p->currentFrame = oldFrame;
     return JSC::asObject(eng_p->scriptValueToJSCValue(result));
 }