A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Michael Bradley
Date: 2015 Aug 31, 00:49 -0700
Increment from one day to the next of sun's declination just now is a similar value to your error Frank.
.....So something to do with either the date time group or the almanac jumping one day across local noon
.....But the almanac is referenced to UT, so probably wouldn't choose noon local time to throw a glitch
.....Therefore my guess is a date/time handling error of some sort