Updates to Dota 2 have been released. The updates will be applied automatically when your Steam client is restarted. Fixes include:

UPDATE January 20th, 2012:

• Fixed Invoker's Quas, Wex, and Exort not giving Invoker bonus stats when upgraded.
  
• Fixed Invoker's Invoke to properly swap the invoked abilities if the new spell already exists
  
• Fixed Sticky Napalm triggering off of Orb of Venom
  
• Fixed Glaives of Wisdom being usable while silenced
  
• Fixed Cold Snap not being castable on Roshan
  
• Fixed EMP cast range