Index: helpers/basic_auth/NCSA/ncsa_auth.c
===================================================================
RCS file: /cvsroot/squid/squid3/helpers/basic_auth/NCSA/ncsa_auth.c,v
retrieving revision 1.10
diff -u -p -r1.10 ncsa_auth.c
--- helpers/basic_auth/NCSA/ncsa_auth.c	25 Jun 2007 11:27:03 -0000	1.10
+++ helpers/basic_auth/NCSA/ncsa_auth.c	6 Sep 2007 14:12:00 -0000
@@ -124,8 +124,11 @@ main(int argc, char **argv)
 	    *p = '\0';		/* strip \n */
 	if (stat(argv[1], &sb) == 0) {
 	    if (sb.st_mtime != change_time) {
-		read_passwd_file(argv[1]);
-		change_time = sb.st_mtime;
+		int diff = time(NULL) - sb.st_mtime;
+		if (diff > 2 || diff < 0) {
+		    read_passwd_file(argv[1]);
+		    change_time = sb.st_mtime;
+		}
 	    }
 	}
 	if ((user = strtok(buf, " ")) == NULL) {