For those of you wanting to use the K2 theme for your WordPress 2.5 installation you may want to be advised of a few current issues with the theme.

Problem:  K2 (< 1.0-RC5) Enabling Sidebar Modules/K2 Sidebar Manager breaks Dashboard.

Fix: Either disable Sidebar Modules/K2 Sidebar Manager in K2 Options or upgrade to 1.0-RC5.