The 'preferences' window without a scrollbar (an option)
Either by a manual resize (after the manual window resize it remembers forever) OR just a noticable button at the top which can be like "show full view". I say option; as definately a lot of people with home computers would not like a application window taking up the full vertical space of their desktop.
I know it may sound silly to users who like this but I just find the scrollbar an inconvenience on an already well presented 'Preferences' window of VLC