I've been monitoring my frozen lake since the update, and I have been removing some islands. Previously, the new water patches froze over in a matter of days, but since 1.5.01, the water doesn't seem to be freezing anymore. After my first session (two days of snow), a previously 30x30 area was entirely frozen except for 6 squares. Now, three snow sessions later, ALL 6 squares are still frozen, and I have begun encountering large ponds in previously explored areas NOT freezing over in the snow.
Anyone else with similar experiences?
Advanced Train Station