I’ve got the same issue. Using v1.3.1, test emails work fine, but I’m not receiving update emails.
Cron appears to be fine (from Cron View plugin):
Oct 8, 2012 @ 2:19 (1349662787) Twice Daily sc_wpun_update_check
Seem to have this error in WordPress log every time plugin runs:
[08-Oct-2012 01:18:18 UTC] PHP Notice: Trying to get property of non-object in /…/wp-content/plugins/wp-updates-notifier/wp-updates-notifier.php on line 204
sc_wpun_settings key (email addresses masked):
a:7:{s:9:”frequency”;s:10:”twicedaily”;s:9:”notify_to”;s:28:”web@…”;s:11:”notify_from”;s:28:”web@…”;s:14:”notify_plugins”;i:1;s:13:”notify_themes”;i:1;s:12:”hide_updates”;i:1;s:8:”notified”;a:3:{s:4:”core”;s:0:””;s:6:”plugin”;a:0:{}s:5:”theme”;a:0:{}}}
