This update is a big one, and I would love to get feedback on how it works for you.
Please make sure you're running the latest beta client on both machines, dated March 31 or newer.
You can post feedback in the discussion group:
http://steamcommunity.com/groups/homestream/discussions/0/540737415036961031/
Revamped architecture to support many more games and improve responsiveness
Hosting from Windows XP, Mac OS X and Linux is temporarily disabled
Fixed black screen when encoding with Intel QuickSync on Intel HD 3000
You can now use a game controller in the Borderlands 2 launcher
Fixed controller rumble support on Windows 8 clients
Adjusted controller dead zone for mouse emulation mode to reduce cursor drift
Fixed mouse cursor visibility and shape issues
Everybody in this group as of right now is in the beta!