Does Facebook request response do not contain request_ids? What's happening?

Used the SDK for iOS for Facebook. Everything works (auth and feed dialog, etc.), with the exception of the request dialog box; the dialogCompleteWithUrl callback function retrieves the URLs of responses that do not contain request_ids at all! We get something like "fbconnect: // success? Request = 177205945735026 & to% 5B0% 5D = 559849340", which effectively translates to "fbconnect: // success? Request = 177205945735026 & to [0] = 559849340" if you decode url coding. We checked a friend's account; there were no requests in the notification section. Can anybody help?

In addition, we tested the sample Hackbook using the Send Invitation menu; it did NOT work either: it generates similar URLs without request.id request.

BTW. We use the latest version of iOS for Android iOS (downloaded last week on April 20, 2012) on the latest Xcode 4.3.2 using iOS 5.1 and 5.0; tests were carried out both on the simulator, and on the new iPad, as well as on the iPhone 4. The test using http://demo.vatlab.net/RequestDialog.aspx works between user accounts used in iOS sdk, mentioned above.

Thanks for that in advance.