xubuntu Software Updater

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http://ubuntuforums.org – i booted up my virtualbox to do updates on it and went tpo open the update and it was suddenly checking and after i rebooted it it checked again, i rebooted again to see it it happened still i looked in startup items and turned the update-notifier off and it still does it i have no issue with the silent update checker, but i don't want a interactive one poping up at login i really like that xubuntu's updates just add a tray icon instead of a window in the past like ubuntu does (at least it did in gnome 2, but there was a setting to tray it) is the update checker gui at login a bug? i am be (Hardware)