I am using the frisco theme on my wordpress mu blog site. I have it setup simular to your demo with the welcome page.
I am using the new wordpress admin bar and have installed a plugin called always-show-admin-bar.0.2 so that it always shows. It works like a charm, however, when I use the custom stylesheet and custom functions for the welcome page it disappears?
Your guidance here would be greatly appreciated.
"Custom Stylesheet Check this box to use a custom stylesheet. Create custom.css in the main theme directory.
Custom Functions Check this box to use a custom functions file. Create functions-custom.php in the main theme directory."