*sigh* not again please. "Any idea what this means" - it means you're supposed to contact the module author. Write him an email or something. Quite surprising, I know.

The error box indicates that a module's !bang command has crashed. The LS core caught a previously unhandled exception which would have crashed the Litestep process, but instead the core managed to show the error box.

About the minimizing all windows part, try showdesk.dll.