any one finded the solution to this, or what is the problem?
Not sure exactly to which of the three issues are you referring, however here is a brief summary listed in the same order.
1.- As mentioned above by scysys, this issue is caused by Shoutcast's default configuration, but it doesn't cause any problems, other than showing the error message every time it starts.
2.- This is a third party issue, either "Tunein" isn't compatible with Shoutcast 2 streams, or you are not complying with their requirements.
You will need to contact the third party for further support.
3.- The html 5 player included in the DNAS page works fine for us both in Chrome and Firefox, if you are experiencing this issue please open a ticket to our support department, and our staff will be happy to take a look.