That's an emergency mode, which is activated when there is national crises from Japan, like the earth quake happening now, so that when you see that big black stain on your watch, you need run to higher places as quickly as possible...
Kidding aside, I do feel great sympathy and admiration for what is happening in Japan and how its government and people are handling the situation, a very impressive nation.
Yeah, back to the topic, it looks scary, I wouldn't wear it any longer, before I figure out what that is. A leak from battery sounds plausible, in that case, you better just get rid of it.
...........happened to my "new to me" 6630 after i opened it in south florida(high humidity) and then brought it back here to indiana to a 30 degree wind chill blowing on the watch while riding my four wheeler! the 2 day drastic change in temp. allowed condensation to form on the crystal just form the brief time i had the back open! i opened the back up again and the water evaporated! and the spot is gone
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