I have the latest version of firefox and this problem started a few days back. When I start chatting on fb chat right after I stop typing my friends say my status appears offline. The fb page keeps refreshing and everytime it reloads my chat window gets disturbed. Sometimes what I had typed and entered in the chat window appears in the chat box 3-4 times. Not sure if this could be a plugin problem? I have the latest version of Java and Flash player installed.