ws://null

Hi,

I am running the same application in the same browsers on two different machines,
on one machine every thing works great but on the other I get this error: 

```
WebSocket connection to 'ws://null/' 
failed: Unexpected response code: 200 binary.js 25
```

Browser: node-webkit
First machine: Windows 7 64
Second machine: Windows XP 2002 SP2
Please help, Thanks.
