TauLabs/TauLabs — pull request #424 by peabody124 (2013-03-25 13:31:15+00:00)
Title: UBX: Require TIMEUTC_VALIDWKN instead of TIMEUTC_VALID_UTC

This flag was frequently not set and stopped the GPSTime object
updating, and thus the HomeLocation from updating. This seems
to be related to leap seconds but probably isn't an issue:

http://lists.linuxtogo.org/pipermail/smartphones-standards/2008-September/000440.html