After installing the Update Rollup 12 for Microsoft Dynamics CRM 4.0, I get an error (“Microsoft Dynamics CRM has encountered an error”) in the web frontend when closing an activity (e.g. a task). The error report says: <CrmScriptErrorReport> <ReportVersion>1.0</ReportVersion> <ScriptErrorDetails> <Message>Object expected</Message> <Line>1</Line> <URL>[…]</URL> <PageURL>[…]</PageURL> <Function>function anonymous() { TrySetFocusOnSubject() }</Function> <CallStack> <Function>function anonymous() { TrySetFocusOnSubject() }</Function> </CallStack> </ScriptErrorDetails> <ClientInformation> <BrowserUserAgent>[…]</BrowserUserAgent> <BrowserLanguage>en-us</BrowserLanguage> […]