Apparently gog rushed the first patch: http://www.gog.com/forum/general/divinity_original_sin_on_gogcom_bstatus_updateb/post480

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A new installer 2.2.0.4 is available for download (PC) with D:OS version 1.0.51
For those who has already downloaded the game, the patch 2.2.0.4 is available, bringing the previous build up to date.

However, if someone patched the game yesterday to 2.1.0.3 - please reinstall the 2.0.0.2 build and then patch it to 2.2.0.4. Yesterday's patch was somewhat rushed and that's the best way to avoid conflicts. Sorry for the inconvenience.