This bug is referenced (along with a fix) in: http://sourceforge.net/mailarchive/message.php?msg_id=12475397 Fix: See link above How-To-Repeat: Upgrade RRDTool to the latest version.
Responsible Changed From-To: freebsd-ports-bugs->az I'll take it.
State Changed From-To: open->closed Committed. I tested it and it's help me. Thanks!