All,
It seems that Jupiter has been hit by something, much like the shoemaker-levy impacts in 1994, a prominent black spot has appeared.
This one is near the south pole, it wasn't there 2 days ago when I saw this area last, so it's happened very recently!
Image coming soon, but if you're up, go have a look at Jupiter :-)
More to come I'm sure...
cheers, Bird
http://jupiter.samba.org
update: Glenn Orton from JPL has used the NASA Infrared Telescope at the summit of Mauna Kea to confirm that this is an impact and not a local weather event.