LionScrollbars is a useful application that provides fine-grained control over how scrollbars are displayed in Mac OS X 10.7 Lion.
LionScrollbars is a utility application for toggling scrollbar behavior (visibility) on a per app basis.
The default behavior for scrollbars in Lion only allows for three settings in System Preferences (always show, always hide, mouse-device specific); these settings apply to ALL applications.
However, for some application you might find yourself wishing you could see a scrollbar (such as if you're editing text or code, etc.); with this program you can do that!
Application preferences are stored in .plist files for each application. These preference files allow for overriding system defaults, so we write to these files for any application for which you wish to override the system default.
Unfortunately in OS X Lion a sandboxing mechanism was introduced, which drastically complicates where and how preferences are handled.