Given my site name is "Invision Power System - the best forum solution in the world" but I want it to have on all other pages only saying "Invision Power System"?  Thanks.

You can use the live meta tag editor to edit the page titles on other pages individually if you wish. I'd recommend setting your site name to "Invision Power System" in this example, but then editing your index page using the meta tag editor to change the page title for just your homepage (to the longer form version).

44 minutes ago, bfarber said:

I'd recommend setting your site name to "Invision Power System" in this example, but then editing your index page using the meta tag editor to change the page title for just your homepage (to the longer form version).

That's a good idea, thanks.