Evolution-alarm-notify possible bug

The program 'evolution-alarm-notify' received an X Window System error.
                                               This probably reflects a bug in the program.
                                               The error was 'BadWindow (invalid Window parameter)'.
                                                 (Details: serial 346 error_code 3 request_code 18 (core protocol) minor_code 0)
                                                 (Note to programmers: normally, X errors are reported asynchronously;
                                                  that is, you will receive the error a while after causing it.
                                                  To debug your program, run it with the GDK_SYNCHRONIZE environment
                                                  variable to change this behavior. You can then get a meaningful
                                                  backtrace from your debugger if you break on the gdk_x_error() function.)