I use Resilio Sync to copy my save files between my computers. I noticed that Sync was not copying recent saves from my linux laptop. Turns out, the save files only have owner read and write permissions, with nothing else. The way Sync runs on linux requires group read and write access. I went through recent versions of VASSAL, and the change first appears in 3.4.4. In 3.4.3 and earlier versions, the save files had owner read and write, group read and write, and other read access.
Does anyone know if this was an intentional change? I am working around by just changing permissions on the save files after a game, but I am curious if there was an issue with the prior permissions settings.