NightStalker: As you probably gleaned from the bug tracker issue, the changes to the updater were implemented as a workaround. This was because the only way to have the packager build "correct" pk4s was to force a situation where the afflicted files would have to be regenerated completely due to an "update" to an existing file and we couldn't ensure this for all the afflicted files. As I recall, this was implemented as an 11th hour kind of thing, so I admit that I probably didn't test it as well as I should have (and I don't think I got around to testing it on Linux at all) - hence the lack of issues on Windows. In theory, it shouldn't matter that the tdm_update_* files have bad dates as the cleanup step in the updater should sort this out. But it is quite likely that I may have missed something in relation to the differential updates, which would not surprise me given how difficult it is to follow the updater code (as you can attest). I'll have to try and fix my Linux environment and run some some tests on there to see if I can isolate why the cleanups didn't work (in particular, I'll need to see why the differential updates still have this issue since the packager was "fixed" prior to the release of 2.04). And I agree that this is treating the symptoms, but unless we can actually track down and properly resolve the issue in the underlying zip library (or switch to a more modern version or alternative library), I'm not sure how to finally resolve this. I assume that you also checked this bug for background: http://bugs.thedarkmod.com/view.php?id=4110 In that issue, you can see that neither gnartsch, nor myself could figure out why the dates were getting our of whack in the zip/pk4 files in the first place, but my suspicion was that the minizip library used by Doom3 is at fault. I think it might be possible to regenerate older releases, but I'll have to make sure that the packager is actually buillding valid differential update zip files. Anyway, I'll take another look at this during the week and see what I can come up with taking your suggestions into account.