One problem I saw was this one tile where the heightmap was wrong, and all the tiles were sligtly more submerged than they were meant to be, so you had a couple of provinces underwater and a load which had had the provinces cut off.

http://steamcommunity.com/sharedfiles/filedetails/?id=738741806

I can't see the picture you posted, steam's being annoying. How big is the tile and what is it shaped like?

It's tile 885. Having looked at the province file, though, I can see than in theory, most of the provinces are actually working right, except for that one green island in the south west, which is under the water. But the sea around there is all a flat blue and looks really wierd (it should drop away quickly to a darker grey?), a load of the coast provinces are way too small and the island in the north east (two provinces, both green) should definietly not be more than one province. When I say too small, i mean hard to click on too small.

@Broken Sky That was one of the earlier tiles and the light blue was meant to represent the coastal waters of a continental plate. However, I agree it looks a little wierd. I've already changed the heightmap but will need to readjust the province maps so I will include that fix with the next update. Those islands you mentioned are errors, I completely agree with you that they should be just one province each.

itsn't compatible with extende timeline.

It is compatible with extended timeline for some and not for others. I have no clue why this is. You are the second person to mention this bug. When did it crash for you? I can load it into the game but I haven't actually played a full game with it.