Been playing card hunter for around a week no with no large issues. I'm playing using the latest version of chrome (Version 28.0.1500.71 m). Today I logged into play and the fps had went from silky smooth to unplayable. My login information and setting had been lost as well. The problem was solved by disabling one of the two copies of flash (chomes copy) in chrome://plugins. I have previously disabled this to fix issues with flash in chrome and the problem is likely an issue with chrome or flash and occurred when the plugin re-enabled itself. Figured I should mention it anyhow.
Hi, this problem is associated with Flash 11.8. It seems to have broken performance for our shader operations. You can go back to an older version of Flash. Another work-around is to disable lighting in the game via the options.