Can't post question in Forums from VS 2013

I can't ask a question from VS 2013 Ultimate or VS 2012 Ultimate from VS IDE.

I went to VS 2013 Help/Feedback/MSDN forums. The social.msdn.Microsoft.com/Forums page was opened in the IDe, editor pane.

I have signed in with my email and password, and clicked 'Ask a question'. In replay I am getting message box with the text:

"Error has occurred on this page:

Line: 372

Char: 17

Error: Unable to get property 'createRange' of undefined or null reference

Code: 0

URL: http://socisl.msdn.microsoft.com/Forums/vstudio/en-USA/newthread?category=&forum="

It is if I have selected the forum from Windows gadget MSDN Forums.

If a forum is not selected, the message box says:

"Error has occurred on this page:

Line:1

Char:1

Error: Forums is undefined                (It says 'is', not 'are')

Code: 0

URL: Same"

If I am going to the same URL from any browser (IE11, Firefox, Opera), all is working just fine.

For example, I am posting this message from IE11.

I had no problem with VS 2010.

Any help?