--- directory-1.20/birthday.bst	2004-09-22 23:06:04.000000000 +0200
+++ texmf/bibtex/bst/directory/birthday.bst	2007-01-13 22:14:38.000000000 +0200
@@ -131,8 +131,8 @@ FUNCTION {format.names}
 
       nameptr #1 >
 	{ namesleft #1 >
-	    { ", " * t * }
-	    { " {\dirandf} " * t * }
+	    { "%, " * t * }
+	    { "% {\dirandf} " * t * }
 	  if$
 	}
 	't