The game was moving slow since I started playing in dec '12 but lately it's gotten worse. This morning moving the interface kept freezing so I had to reenter the game several times. Even when it didn't freeze completely it the UI was very very slow to respond: moving the pointer over a player or button, it took several seconds for that control to be highlighted.
Here's my box: cpu @ 1.7G, 2 GB ram, ubuntu, chrome with Shockwave Flash 11.5 r31 plugin.