Here is a quote from another thread.
The original poster is a Disney Transportation CM.
"As of today, there will no longer be service from the Disney-MGM Studios to Downtown Disney. As some of you might recall, there was a test route that was one-way only from Studios to Pleasure Island. That service has been discontinued.
Guests who are staying at a Disney Resort may go back to thier resort, and transfer to a Downtown Disney bus from there. Guests who are not staying at a Disney Resort will either have to take thier own car, or take a taxi.
On the plus side... Hoop-Dee-Doo folks will be glad to know that Resort Buses now pick up after the show at the Outpost Depot. Formerly, we'd run a few floater DTD buses, but now the buses go straight to the resorts. (This isn't an official service, but something the dispatchers will do... can't guarantee it'll be available every night)"