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Important Note

This filter can only check future syndication posts. Whatever duplicates are already present in your WordPress installation you'll have to remove/clean-up on your own.

License

Copyright (C) 2008, 2009 by Mark R. Allen All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
• Neither the name of Mark Allen nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission.