CLONE -Floating-point invalid operation detected when create an instance of a QFormBuilder(),

Hello,

following error with QFormBuilder and QtWebkit appears

QtScriptd4.dll!QTJSC::JSValue::JSValue(QTJSC::ExecState * exec=0x000000003594da98, double d=1.#QNAN00000000000) Line 580 C++
QtScriptd4.dll!QTJSC::jsNaN(QTJSC::ExecState * exec=0x000000003594da98) Line 413 + 0x18 bytes C++
QtScriptd4.dll!QTJSC::DatePrototype::DatePrototype(QTJSC::ExecState * exec=0x000000003594da98, QTWTF::PassRefPtr<QTJSC::Structure> * structure=0x000000000802d808) Line 401 + 0xf bytes C++
QtScriptd4.dll!QTJSC::JSGlobalObject::reset(QTJSC::JSValue prototype=

) Line 237 + 0x95 bytes C++
QtScriptd4.dll!QTJSC::JSGlobalObject::init(QTJSC::JSObject * thisValue=0x0000000035900000) Line 150 C++
QtScriptd4.dll!QTJSC::JSGlobalObject::JSGlobalObject() Line 158 + 0x15 bytes C++
QtScriptd4.dll!QScript::GlobalObject::GlobalObject() Line 46 + 0x13 bytes C++
QtScriptd4.dll!QScriptEnginePrivate::QScriptEnginePrivate() Line 788 + 0x30 bytes C++
QtScriptd4.dll!QScriptEngine::QScriptEngine() Line 1456 + 0x33 bytes C++
QtDesignerd4.dll!QFormScriptRunner::QFormScriptRunnerPrivate::QFormScriptRunnerPrivate() Line 63 + 0x1d bytes C++
QtDesignerd4.dll!QFormScriptRunner::QFormScriptRunner() Line 129 + 0x33 bytes C++
QtDesignerd4.dll!QFormBuilderExtra::QFormBuilderExtra() Line 89 + 0x2b bytes C++
QtDesignerd4.dll!QFormBuilderExtra::instance(const QAbstractFormBuilder * afb=0x00000000358c4a20) Line 232 + 0x21 bytes C++
> QtDesignerd4.dll!QAbstractFormBuilder::setResourceBuilder(QResourceBuilder * builder=0x00000000358c3bc0) Line 2217 + 0xa bytes C++
QtDesignerd4.dll!QAbstractFormBuilder::QAbstractFormBuilder() Line 173 C++
QtDesignerd4.dll!QFormBuilder::QFormBuilder() Line 108 + 0x1c bytes C++