Hi there,
I'm trying to use the theme "281" by Paul Stamatiou - but it just don't shows up under "Themes" even if I enable it for all blogs...
(same thing if I'm trying to enable it for a specific blog)
I don't know where to start to solve this...
Are you getting the "template broken" message? I'd check that, usually you can fix things by making sure the style.css file has the correct formatting at the top (typically the top line is "template name: something" Get rid of that line and it should work.
I never tested it with WordPress MU... maybe it just doesn't work w/ MU? Is it uploaded to the right folder?