If it's known issue and nothing going to change I'll delete my models catalog soon to avoid forthcoming errors then. I assume that my ns2 folder contains quite a bunch of such corrupted game files and hope I can help to find out why files pass the steam integrity check but in the same time fail game server integrity check (I witnessed that a lot of people had such issue appeared for a long time) so I'll able to provide more altered files.
You can see an example of altered byte on 4123920 (0x3eed10) offset.
If there are any missing or corrupt files Steam with automatically download replacement files. Have no idea why and how files could became different. What does validating mean in steam When you validate the files, Steam will check each file on your HDD against the files listed on their database for that game. I attached archive containing both files: the regular file is a wrong file which pass the steam cache verify for some reason and the '*(2).dds' file is a redownloaded correct file. So the steam verification is wrong because I deleted the file given in log.txt, redownloaded it and took hashes: the hashes turn out to be wrong. When you validate games on Steam, what the client will do is check that all the. If I check game cache through steam it says that all files successfully passed the check. One of the bugs is that users failed to validate Steam files and files. Several time I was suffering being kicked from server with error that my game files do not match the server's.