So here is the hopefully complete list of everything that updated for me without changing version numbers.
The whole thing was probably a fixing of the installers that still had that v2 uninstall bug and were not scheduled for some other update, but that is speculation on my part.
Alone in the Dark (126.96.36.199)
Arcanum: Of Steamworks and Magick Obscura (188.8.131.52)
Avernum The complete Saga (184.108.40.206)
Baldur's Gate 2 Complete (220.127.116.11)
Baldur's Gate The original Saga (18.104.22.168)
Battle Chess Special Edition (22.214.171.124)
Beneath a Steel Sky (126.96.36.199)
Betrayal at Krondor (188.8.131.52)
Blood 1 (One Unit whole Blood) (184.108.40.206)
Broken Sword 2 - The smoking Mirror (Original game) (220.127.116.11)
Broken Sword 2 - The smoking Mirror (Director's Cut) (18.104.22.168)
Broken Sword Director's Cut (22.214.171.124)
B-17 Flying Fortress: The mighty 8th (126.96.36.199)
Caesar 3 (188.8.131.52)
Conquest of the New World (184.108.40.206)
Crusader: No regret (220.127.116.11)
Crusader: No remorse (18.104.22.168)
Descent 1+2 (22.214.171.124)
Duke Nukem 1+2 (126.96.36.199)
Duke Nukem 3D Atomic Edition (188.8.131.52)
Dungeons & Dragons: Dragonshard (184.108.40.206)
Dungeon Keeper (220.127.116.11)
Dungeon Keeper 2 (18.104.22.168)
Earthworm Jim 1+2 (22.214.171.124)
Fallout 2 (126.96.36.199)
Fallout Tactics (188.8.131.52) (Installer broken now, at least for me. Perhaps wait a few days with the download)
Gabriel Knight 2: The Beast within (184.108.40.206)
Gabriel Knight: Sins of the Fathers (220.127.116.11)
Giants: Citizen Kabuto (18.104.22.168)
Heroes Chronicles: All Chapters (22.214.171.124)
Heroes of Might and Magic 3: Complete Edition (126.96.36.199)
Hostile Waters: Antaeus Rising (188.8.131.52)
Icewind Dale Complete (184.108.40.206)
Icewind Dale 2 (220.127.116.11)
Jagged Alliance 2: Unfinished Business (18.104.22.168)
Kingdom: The far Reaches (22.214.171.124)
Lionheart: Legacy of the Crusader (126.96.36.199)
Lure of the Temptress (188.8.131.52)
Magic Carpet (184.108.40.206)
Master of Magic (220.127.116.11)
Master of Orion 1+2 (18.104.22.168)
Master of Orion 3 (22.214.171.124)
M.A.X. 1+2 (126.96.36.199)
Neverwinter Nights Diamond Edition (188.8.131.52)
Sid Meier's Colonization (184.108.40.206)
The Chronicles of Riddick: Assault on dark Athena (220.127.116.11)
The Manhole Masterpiece Edition (That's the weird one as it is still a v1 installer)
Phantasmagoria 2 (18.104.22.168)
Planescape: Torment (22.214.171.124)
POD Gold (126.96.36.199)
Hmm I should write something to the support regarding the broken Fallout Tactics installer, but I think I wait till Monday or so, they'll already have it fixed themselves then, problably.
So now they're being updated without changing version numbers? This is getting really stupid, how many damn times am I going to have to re-download these games?
Beneath a Steel Sky has gone from being a 78.1MB installer to being just 21.3MB, and no version number change between these two, clearly different, versions. The download page still gives the 78.1MB download size, even though the download is now actually only 21.3MB. What's going on GOG?
EDIT: BIG WARNING FOLKS!!! I've extracted both the old 188.8.131.52 and the new 184.108.40.206 installers for Beneath a Steel Sky just to have a look around. The old one uses ScummVM, the new one uses DOSBox. That isn't the big bit though. The old one has a sky.dsk file of 69MB, whilst the new one has a sky.dsk file of only 8.41MB, highly suggesting that the old one was the CD version and the new one isn't, meaning we now have an inferior version of the game.
Well, at least I can get the correct aspect ratio with the DOSBox version as I couldn't figure out how force the correct ratio in ScummVM, but the downgrade from the CD version really sucks.