Everytime I log in, and send the request to the notification server, the buddyInfo inside the json returned is always blank now. Before I used to see the logged on buddies, but now its nothing there:
{ "@pendingMsg" : 0, "@syncStatus" : 0, "responses" : [ { "buddyInfo" : { "sequence" : 1 } }
] }

Can anyone confirm if it's still working for them fine? I am able to get the offline msgs, presence status change etc, but not seeing the buddyInfo.

My call to fetch notifications is like this:
string pushUrl = GlobalVariables.URL_YM_NOTIFICATION_LONG +
"?oauth_consumer_key=" + GlobalVariables.consumerKey +
"&oauth_nonce=" + new Random().Next(123400, 9999999).ToString() +
"&oauth_signature=" + GlobalVariables.consumerSecret + "%26" + GlobalVariables.oauthTokenSecret +
"&oauth_signature_method=PLAINTEXT" +
"&oauth_timestamp=" + GlobalVariables.getTimestamp() +
"&oauth_token=" + GlobalVariables.oauthToken +
"&oauth_version=1.0" +
"&sid=" + GlobalVariables.sessionId +
"&seq=" + GlobalVariables.seq +
"&format=json" +
"&count=100" +
"&idle=120";

and I am sending the IM cookie like this:

CookieContainer container = new CookieContainer();
Cookie cookie = new Cookie("IM", GlobalVariables.IM);
container.Add(new Uri(pushUrl), cookie);
pushRequest.CookieContainer = container;
pushRequest.Method = "GET";

Are you polling for the notification immediately after login? The buddyInfo notification after login will typically come in batches, and can take a few seconds sometimes. The other thing I noticed is your notification indicates sequence value 1. Can you confirm that you are polling and requesting to start from sequence value 0?