1.1a patch
From Witcher Wiki
Note: This is not the latest patch. The latest patch is here
From the official site:
The new patch replaces patch 1.1 and corrects a possible blocker bug that might occur in Act5.
"We've tried to fix as many problems as possible and provide a more stable version for the game as quickly as we could, hence the oversight. I'd like to ask everyone who hasn't yet installed the patch or has installed the 1.1 patch to update to version 1.1a." - said Jacek Brzezinski, Project Lead for The Witcher.
Installing the 1.1a patch will not cause any problems with existing saved games.
