This release contains minor bug fixes and new features. Besides the little bug fixes, there's a fun new feature in mk-heartbeat: it can auto-discover slaves recursively, and show the replication delay on all of them, to wit:
baron@keywest ~ $ mk-heartbeat --check --host master -D rkdb --recurse 10 master 0 slave1 1 slave2 1 slave3 4
(Not actual results. Your mileage may vary. Closed course, professional driver. Do not attempt).
Nothing else in this release is very exciting. I just wanted to get the bug fixes out there.