So if the GOG version isn't update to the latest version, so which fault is that, GOGs or Double Fines?

Double Fine chose to only push the patch on Steam. None of the other retailers got it, and they didn't release it for owners of physical copies either. It has nothing to do with GOG.

The HIB version is the latest one, presumably because HIB5 launched after the patch was released. That's the only non-Steam digital version that's got the patch, though.

Come on Double Fine and GOG! Patch this game already! It's long overdue at this point

Links are broken :-/ Could someone update them or share this patch again?

Double Fine should have released the patch for other platform as well. Maybe the didn't have the resources. However, not matter how you look at it, it's still unacceptable.

Awesome work by you, this should be stickied.

Thank you so much for doing this, since GOG isn't getting any of the newer updates and this is the only way the GOG version is up to date.

Does the patch change the Meat Circus in any significant way, and if so how exactly? Also, do you think it woud work to use old savegames from the GOG version with the patched version (unoficially patched GOG version, HIB version or Steam version) or would one have to start a new game in order to profit from it?

Ive played the retail 5 disk version with this patch. The game played rather identicle that I couldn't tell that the game was eaven patched. Of course during some levels the game becasue unstable and crashed to desktop a lot which never happened with just playing it unpatched on windows 7. The levels that became very unstable were Fishopolis (after news headline cutscenes) The milkman conspiricy (random crashes oftern) and Waterloo board game (mainly around collecting the figments around the trees and snails). Had to save oftern to not lose progress.

As for the meat circus level, I can't remeber if you had to restart from the entrance if the kid got Ko'ed or if he healed after each floor in the original but its still a hard level. I didn't bother trying to finish this area becasue I have finished the gaem long ago. I only play it for the fun not the frustration.

The file isnt't available anymore. Can anyone make it available again?
I also have the issue that i cann't switch to german language. I copied the data from the german folder to the english and the text worked. But what is with the cutscences?

seems like Patches Scrolls mirrored it:
http://www.patches-scrolls.com/search.php?game=psychonaut&platform=1&cnt=25

Are any of the newer updates included in this unofficial patch?

Those links were dead for me, but a search found the patch here.