We've rolled out some big changes this afternoon including a new, more readable design for the cards and a new version of the Flash game client with several enhancements and bug fixes:

New features
-A new Quick Challenge that's much faster and more informative than before. You can enter quick challenge mode whenever you like by clicking the button (crossed swords) at the bottom of the room list.
-Better motion of projectiles during the battles
-An animation for Sureshot (when your attack is at least double that of your opponent)
-Shortcuts for common actions (tooltips available when you mouse over the buttons)
-Nicknames of other players are more visible
-Flags are visible during battles
-New card appearance is carried over to the battles
-And many more little tweaks for you to discover.

Fixed
-Bug that caused all cards to pile up at the left of the screen
-Some text in popups was cut off
-Improved memory / resource management by the game

I hope everyone likes the new changes. We're still working on making the game even better with future releases.
If you have any trouble with the new client please contact support.

Thanks Galix!