[wp-trac] [WordPress Trac] #18876: Network admin update-core.php doesn't check for plugin or theme updates

[WordPress Trac]

#18876: Network admin update-core.php doesn't check for plugin or theme updates
---------------------------+-----------------------------
 Reporter:  johnbillion    |      Owner:
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Network Admin  |    Version:  3.3
 Severity:  normal         |   Keywords:
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 Visiting `wp-admin/update-core.php` on a single site install or on the
 main site of a network install will fire off update checks for everything
 -- core, plugins and themes.

 Visiting this screen within network admin (`wp-admin/network/update-
 core.php`) only checks for updates to core. I believe this is unexpected
 behaviour based on discussion in #14764 and it's inconsistent with the
 behaviour of the screen on the main site or a single site installation.

 The problem occurs because `wp_update_plugins|themes()` are only added to
 the `load-update-core.php` hook when `is_main_site()` is true.

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Ticket URL: <http://core.trac.wordpress.org/ticket/18876>
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