Ok, the situation is I just updated my primary name server (BIND on Linux.) In most cases with everything configured properly (and assuming you updated the “serial” in your zone configuration,) the change should propagate quickly. But if something goes wrong you can force the retransfer with this command:
/usr/sbin/rndc retransfer example.com
BTW, one last tip. If you can’t remember if you updated the serial it helps to make it the date. For instance 20130223. Just an easy way to keep track and it lets you know the last time you updated the zone.