Im not 100% sure if this is V9 or not but Ive never seen it happen before nor have I heard anyone post or talk of it before. Im also not taking screenshots to explain as I cant be bothered, just follow what I say and dont be stupid.
When you get a console message, It updates the 0 New Messages to whatever number of messages received right? And you click on that to read the message right? But when you have your Friends list section of the console open and you get a message, the person who sent it will have a 0 beside their name and it should change to whatever number of message they sent.
This isnt the news dont worry!! What I found is that if you click that person's number when they have sent a message, It opens up the message for you, ready to read and reply!
Sorry if you found this un-interesting or not important, its habbo news so hush and sorry if its been posted before