I updated the ladder calculations according to this formula.
2500 tiles, K = 20 (50x50)
5000 tiles, K = 24 (100x50)
7500 tiles, K = 28 (150x50)
10000 tiles, K = 32 (100x100)
15000 tiles, K = 36 (150x100)
22500 tiles, K = 40 (150x150)
Until now the K value was always 32. This mean that you will get more points when you win on a big map compared to a small map.
Keep you eyes open for any errors when you lose or win a ladder game. It's hard to test the lose / surrender functions so there could be errors.
Also we are nearly done with the next version. I'm going to work on it through the easter and when SnotlinG gets back after we should be more or less ready for release.