I see late yesterday the FS Team released viewer 4.4.2. There is an announcement on the FS Blog: Mandatory Firestorm 4.4.2 Update. This version fixes the problem of overloading the Linden stats servers. Users would not notice a problem. So, many might not update and stats indicate that would be the case. The result is this is a mandatory update.
Firestorm Viewer Download is here. Look in the right hand column, white area.

You may have found that your 4.4.1 viewer will no longer login. You get an update message on the splash screen. If you close it and attempt to login, you get another notice and the viewer does not login. If you close that one and attempt to login again, you find you are in a loop. The viewer is not going to login because the FS Team has told it not to. It is blocked by the FS Team.


