Something strange happens: when i want to post a string "??" via ajax to the server

```
$.ajax({
  type: 'POST',
  url: path,
  dataType: 'json',
  data: JSON.stringify({
    text: "??"
  })
});

```

it allways produces something like that in request to the server:

```
{"text":"jQuery21109622253710404038_1411696744993"}:

```

What is happening here? What the problem with double ? ?