I'm using WordPress 3.4.1 on a Multisite installation with 22 Blogs and a total of 65 Plugins, different ones per site.
For some time now, I didn't see any plugin updates and even if I use "Check now" on /wp-admin/network/update-core.php I still get the message that all plugins are up to date when I know for a fact that they are not - some plugins have new versions out but the update check just doesn't show any.
In addition, while browsing around, someone suggested for a slightly different problem to delete the _options field "_site_transient_update_plugins" - there is no such field in my x_options table.
Does anyone have any idea how to get WordPress to check for updates again?
thanks so much!