Via CS:GO Blog:

Dust II

• Fixed sun not showing.
• Smoothed out terrain by CT spawn to allow smoking off from X-Box.
• Removed taxi sign from certain car models.
• Cleaned up alpha painting on Tunnels building for player reads.
• Added window shutter above Catwalk.
• Fixed glowing CT player models on low end settings.
• Adjusted fog values.
• Cleaned up player reads from CT Mid up toward Suicide.
• Improved collision of cover props at B Bombsite.
• Fixed bad surface property sounds on cover props at B.
• Some clipping refinements.
• Fixed a few wall-bang bugs on buildings.
• Grenade clips added to CT spawn.
• Fixed small walls at Outside Tunnels not being reliably jump-able.
• Adjusted a number of models that were not lined up properly.
• Fixed interpenetrating barrels at Mid.
• Fixed some crates at A there were hanging players up.
• Smoothed out wall behind Car at A.
• Fixed displacement that had too high an angle at CT Ramp.