I'm unsure about that rectangular ice tile on the second screenshot - looks strange but it's the only glitchy thing I noticed so far.
Terrain textures seems to get layered in multiple detail levels. If I zoom into an area I haven't been visiting for some time (or when loading a saved game) I can watch the textures being swapped one by one. Doesn't disturb the game, though, maybe it's the same on Windows.
