Plugin Update Notifications Not Working As Intended

[chipbennett]

Environment: WP 3.0.1, multisite enabled, with 2 sites. Site 1 is my primary site, with 35 of 55 plugins active). Site 2 is merely a barebones install for Theme testing, with 3 of 55 plugins active. 1 plugin is network-active.

On primary site (ID1) plugin update notifications do not appear at all, either on the Installed Plugins list, or on the Dashboard -> Updates page. On the secondary site (ID2) plugin update notifications do appear in both locations.

Anecdotally, I cannot find any correlation between activation status (active, network active, inactive) and appearance of plugin update notification. If I recall correctly, when I last mass-updated plugins from the secondary site, it was a mixture of active and inactive plugins.

Since I only observed this behavior after enabling and setting up multisite, I am unsure of the issue is related to 3.0(.1) in general, or multisite in particular.

Please let me know how I can further troubleshoot or investigate, and I'll be happy to report back any additional information requested.

[nacin]

Potentially fixed by #14554. Also related #14553.

[nacin]

See also potential duplicate, #14801.

[PeteMall]

Plugin update notifications were removed from the site admin in 3.1. There are only shown in the network admin.