From Aspyr Media:
The Homeworld 2 1.1.1 update addresses the following issues: Fixed a crash that could happen on startup, especially while using Shapeshifter. Fixed a problem with multiplayer games over the internet. The game uses UDP ports 6074, and 5000 to 5100. Make sure these ports are open and forwarded correctly in your router/firewall. Added an option in the launcher to disable mouse scaling in the game. This option enabled by default, but it can your mouse to act slowly on some machines when the game exits. Disabling this option in the launcher will prevent such issues from happening, but could make the mouse in the game less responsive. Added an option in the launcher to scale mouse movement. Increasing the scale factor will make the mouse move faster, but it will also make the cursor less precise.