filter posts you author from unseen notifications - note there are other ways to do this, but involve some code complexity. This is easier to implement but may have a slight impact on the ping query performance. It's not horrid, just mentioning for the record.

boot.php

@@ -241,6 +241,8 @@ define ( 'PHOTO_XCHAN',            0x0002 );
 define ( 'PHOTO_THING',            0x0004 );
 define ( 'PHOTO_ADULT',            0x0008 );
 
+define ( 'PHOTO_FLAG_OS',          0x4000 );
+
 /**
  * Menu types
  */