In Chapter Three, track down Cori in Loc Muinne for a cut. In Chapter Two, you'll need to look for either Sambor in Henselt's Camp or Felicia Cori in Vergen.
In Chapter One, Flotsam antique book dealer Einar Gausel will offer to get the scissors out. The update also includes a new DLC pack called Barbers and Coiffeuses which adds hairstyling services for Geralt at various locations throughout the gameworld. The patch, announced yesterday, brings with it a long list of tweaks, including a fix for an issue that was preventing Witcher 1 game saves from being exported into the sequel. Update 1.2 for CD Projekt's The Witcher 2: Assassins of Kings is now ready for download from the game's official site.