If it appeared inside a window called the "Error console," you can copy the contents and paste it into an email message to the mailing list. Drag the mouse across the text to select it, then press the key combination to copy it. (On Windows, the command is Ctrl+C. On Mac OS X it's Command+C.) Paste the error into the email message, along with detailed steps on how to reproduce it. The author is committed to eliminating program bugs.