The complete list of changes:
- 64-bit build for Windows
- Selection menu. Hold alt/option when right-clicking to select any object under the mouse pointer, even if it's behind another object
- Move command, animate the position of an object
- Rotate command, animate the rotation of an object
- Added world option to swap the left and right faces of the skybox
- Merge and sort RWX mesh groups, improves rendering performance for many models
- Improved sorting of which cells to query first
- Sort objects by vertex buffer to reduce switching vertex buffers
- Downloads on Linux and Mac OS X can now be interrupted when switching worlds
- Mac OS X: Support for multisample anti-alias
- Mac OS X: Support for V-Sync
- Mac OS X: Show error in chat when entering a world failed
- OpenGL mipmap generation using GL_ARB_framebuffer_object, GL_EXT_framebuffer_object or GL_SGIS_generate_mipmap(tried in that order)
- Sign textures no longer load halfway through rendering a frame
- Don't render MD2 mesh when updating the animation failed
- Fixed memory leaks in MD2 mesh loader
- Fixed memory leaks in texture mask loader