In pot limit games, the bet size slider can always go up to the maximum raise even when your stack is smaller, which leads to getting a pop up window with "invalid bet size" or somesuch when you try to bet too much. Pretty annoying while multi-tabling. Please cap the bet size at the player's current stack size in addition to the pot raise!
The preferred seat option is tricky to find, granted you only need to set it once for each game type, but if it was in the regular Settings menu that'd be awesome.
Cashier button link doesn't work.