I'm wondering if it's possible to come up with an action group that would always cause Mp3tag to write file tags so that the files' timestamps are updated to the current time. This particular application is only needed for Flac files.
It's not hard if you use two simple Action Groups and execute them in succession (e.g. add a bogus field, then remove it). But doesn't seem so simple with a single action. Mp3tag generally is smart enough not to update a file if it doesn't think anything is being changed.
But of course I haven't tried everything. Any ideas?