Well.....some very interesting background in the Harbringer Expansion page. Here is the quote:
Uncertain GroundAccording to another prophecy, the entire world rests upon a glacier that has become too warm, and soon the glacier’s ice will crack, causing the world to split into many pieces. Some fragments will survive to endlessly float upon the cosmic sea, but many others will not.
A planet-wide or perhaps an "island-wide" glacier melting glacier implies a lot of water...is this an early indicator of the Ocean Expansion??????????