how about that diff change

[smaxz]

178,678,300,672.00 to 178,672,041,535.12 for a grand total change of about  625,914.. or 0.00004%.

Difficulty rolled over a million in late 2011. i don't think we have seen changes this minute in scale ever. likely some mining operations in temperate climates that have scaled back for the encroaching mild weather? coupled with new miners reaching the network for the first time of course.