Server: Unable to locate appender ServerGuiConsole for logger

Server GUI doesn't show log output.

Ran command in Windows 8 console:
minecraft_server.1.7.2.exe > err.log 2>&1

This captured the following errors in the STDERR stream before the server log in STDOUT starts.

2013-10-30 13:11:15,004 ERROR Error processing element Queue: CLASS_NOT_FOUND
2013-10-30 13:11:15,057 ERROR Unable to locate appender ServerGuiConsole for logger