About that eco-tourist ship that unexpectedly rammed an iceberg and sunk

See the picture in Andy Revkin's blog entry here.

Excerpt:

They had seen “An Inconvenient Truth” during the cruise and heard lectures on the potential impact of global warming in Antarctica.

Evidently, there's now speculation that this incident may be related to global warming.

That may be, but it seems to me that if the globe was so "warm", the water forming that iceberg may have been present only in less-threatening liquid form.