The M8 Multi Clipboard shuts down under the Vista operating system.
This problem is caused by the miniature windows which Vista displays above the task bar.
If you move the mouse over the M8 multi clipboard task bar entry, M8 will shut down as soon as Vista tries to create it's miniature.
To turn these miniatures off, right click on the task bar, select "Properties"
and un-check the option shown above.
If the miniature previews are important to you, then the only way to avoid having M8 shutdown is to avoid moving the mouse over its task bar icon.