I've been using Yahoo Chat for a couple months with no problems. All of the sudden on the 19th it would only intermittently let me log in. Once logged in it would show all of my contacts as "offline" even if they were available. It let's me send messages to those contacts and they receive them but none of their responses make it back...I've tried two other chat applications from The Market and they are having the same issues....anybody know what's going on???