RSS feed – post not sent out?

Up until now, all of my posts went out quickly and without complications (my site is http://sweetjumbles.com/). The last one, however, was never sent out. I subscribe to my own feed to monitor this. (Unrelated, but I should mention that the “subscribe via email” DID go out.) I did re-subscribe today and with the new subscription the most recent post did show up. But I’m dissapointed and concerned that everyone else out there didn’t get my last post and who knows if the future posts will be disseminated.
Has this happened before? Kink in the system? Kink in my page?
Advice welcome.