This is not exactly an Ardour issue but… I was copying an Ardour project to another machine via a thumb drive. When opening the project on the 2nd machine several audio files where missing. There were files with names like recorder:Audio6.wav. When copying, the colon was replaced by a hyphen. I was able to batch rename so all was well but I’m wondering what is up. The machine I copied from was Linux Mint but the drive that the Ardour project was on was NTFS. I suppose that is the issue???
The colons in the filename would make it awkward to load the project on a Windows machine.
This is already fixed in Ardour 6.6-119.
There were a few rare cases where the colon could leak into the filename; e.g. when creating and immediately record-arming a track.