What other customizations have you made? Does this problem exist on a fresh weewx install?
Like I said, haven't been able to reproduce it so I don't know what's causing it... -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.