The developers have also implemented a few other fixes
After launching the original Half-Life and Counter-Strike 1.6 Beta on Steam for Linux, Valve has now started to push updates for the two games.Both games are pretty stable, especially after so many updates over the years, but it seems that the version for the Linux platform will need some further improvements.
Here are some highlights for the new Half-Life update (it also applies to Counter-Strike 1.6 Beta):
• Returned mouse input to using windows messages rather than raw input. This should correct the sensitivity change people have seen;
• m_rawinput cvar has been added. If set to 1, this enables players to use the raw input API's on their OS to get mouse input, usually with lower latency, but missing the post processing from their OS;
• Corrupt HTTP downloads, which occurred if the url sent by the game server resulted in a 404 error, have been fixed.
More details about this release can be found in the official announcement.
More details about Half-Life and can be found on the official Steam website.