MacUpdater 1.3.5 [BETTER]
With version 1.3.5 (Mac OS X 10.8/Mountain Lion), the maximum number of mailboxes in the lists defaults to 20 but can be changed as described below. In earlier versions the maximum number of items in the lists is determined by the "Number of Recent Items" setting for Documents in the Appearance panel of the OS X System Preferences. Note that this must be set to something greater than 0 for the plugin to have the desired behavior, i.e. it should be set to either 5, 10, 15, 20, 30, or 50. If the lists fill up (reaches the maximum) the oldest item will be discarded as a new item is added. If you want to remove all of the mailboxes from the lists (to clean it up), choose the "Clear Menu" at the bottom of any list.