I don't post very much, so hi all. I got the same thing too, before I installed V4. Since we all started getting this at the same time, I figured it has to be external. On a hunch I went into General Preferences - Misc, where the check for updates at launch is, and hit the check for updates now button - viola I got the same XML error. Not sure if this is everbodys issue, but it seems likely.