The day 1 patch is bundled in with GOG's game. You don't need another patch for it.

We included the day 1 patch with our install so you wouldn't need to register the game to play it, since that smacks a bit of DRM. If they've released another patch since yesterday, that's news to me.

I do seem to recall reading in the forums that Steam had something weird about their version which needed adjusting. That may be why they have a different build number.

We aim to please. :D

To the best of my knowledge--unless they've done something over there at CDP RED and haven't let me know about it--we pre-built our version of the game with the content-fixing patch. Our dev team was up late on Sunday evening / Monday morning getting that completed and uploaded to our CDN.

Once they have a new patch--which I imagine will be soon enough--we'll no longer have the most current version already included in the build. But I don't think you need to update the build that's currently installed from GOG.com.

I'll check in with people who are more in the know than I am and get back to you guys, though.

Just asked the guy in charge of The Witcher 2 franchise at CDP RED. We have the most current patch already installed in our GOG version, despite any differences in version number between our game and Steam. So you don't need to go looking for any patches just yet.

Once a new patch comes out, of course, you'll need to make sure your game is registered to download the patch from CDP RED's servers, but until then you should be good to go.