Rockstar has announced that as part of their "continuing effort to support and enhance Grand Theft Auto IV on the PC" they have released patch 1.0.3. Some of the hights linclude greater control over the graphic settings, including a new "OFF" option for reflection and shadow quality; and the elimination of remapping restrictions for keyboard and mouse.

For a full breakdown of everything in the patch, visit http://www.rockstargames.com/support/IV/PC/patch/index.html.