Strange 4x/day behavior in 4.5x

[bobball]

This is probably too early to post unless it turns out to be an obvious problem: I'm in New York until early next week, a few hundred miles from my Michigan home, and I'm getting summaries of today's notifications showing a report of "low battery at sensor thb0" on my WMR968 every six hours. I can't check the battery until I return, but operation appears normal on Weather Underground (KMIREADI2). And I'm not sure just which version of Meteohub I'm running: 4.5, a or b. The Oct. 7 reports were issued at 05:44:40, 11:46:26, 17:45:41 and 23:46:22. With my current router, an Apple Time Capsule, I haven't figured out how to access NSLU2 remotely.