I'm running version v2.2.2-48f7e59 and when I add the --storage-class 'GLACIER' option to my command line, it does properly put the object in Glacier, but then subsequent sync commands fail to detect that version as the same as the one being on disk and subsequent runs just copy a new version over and over again.

This really defeats the purpose for me... I'm trying to upload backups of a large photo library to use as a cloud backup from my NAS. So there is rarely if ever a need to download everything, but I do... at times... update a few files here and there, mostly just adding files to an already existing directory... so this makes it impossible for me to write a script that executes via cron once a night to upload my backups.