Myspace REST API 400 error after linking account..

Well, small post..
As you know from me previous post - we have iframe based app in myspace..
Their REST API asks for linking accounts via oauth every 24 hours.. Access token expires, etc..
So, were needed to re-ask for linking.
Since today we started to get probs like :

"400 - Bad Request - The callback uri doesn't start with associated application domain."

After linking account.
REST API works for apps, that has "Use External Domain" property enabled. There are also: "External URL" and "External Host".
As the app is iframe based, the url is "http://profile.myspace.com/Modules/Applications/Pages/Canvas.aspx?appId=117611" like for any other app.
We had that params set to real domain that used in iframe, as I inputed them by default when started to develop application. And all was working fine :)
The current problem was fixed now by setting this params to "http://profile.myspace.com" and "profile.myspace.com".
As usual Myspace didnt notify about changes :)