There appears to to be intermittent on-going outages in what ever subsystems provide Avatar on-line/off-line status. I can be logged in and my friends who are on-line don't show on-line. That means I can't IM them without getting the off-line message. I can 't send them a TP and other activities that appear to rely on this service. A relog will help. However, there are side effects. For example, today, I received IMs from friends on my mobile app but they did not appear in my client. So now I have to respond asynchronously. There are no steps to recreate the issue. It happens intermittently and results in real UI degradation.