The Adrenaline Vault Downloads now has the just released 1.1 patch for the FreeSpace2 demo (story) as a separate download. Here's word from Volition on what's new (thanks Voodoo Extreme):

• Desktop resolution vs. gameplay resolution. Previous versions of the FS2 demo had a problem when people would have a desktop resolution lower than the resolution they were playing with. When a region outside the valid desktop area was clicked while ingame, the game would minimize. This version should eliminate this problem.
• Dedicated server stops sending updates during netplay. There was a bug (most often seen during dogfight missions) where clients would see all ships in the game stop moving and float in whatever direction they were heading.
• Similar to the dedicated server problem, clients would often not realize when they had timed-out or been disconnected from the server. This should be properly detected now.
• Dedicated server ghost process. There was a problem where the dedicated server would not properly shut itself down when the "shutdown" button was pressed. It would stay wedged in the process table.