The "Modified" (timestamp) column for all containers and file objects (and virtual folders) shows as "Unknown" for Rackspace CloudFiles (OpenStack) in Cyberduck v6.7.0. I've confirmed the same results on two different Rackspace CloudFiles accounts. I've confirmed I do see modified timestamps as expected on an sftp connection to a server so the problem may be limited to when using Rackspace CloudFiles (OpenStack). This problem started recently since I use this tool often to sort files by their modified date and now I can't.
Log transcript from "Update" at root level is attached.
Is there an example api test you used to determined this so I can provide it for a complete report documentation? (i.e. did you confirm this with a curl script or something?) Can you provide it here and I will submit the Rackspace bug report?
I ran a curl test myself just now for a particular file object and I get a Last-Modified field back.
Not sure if the url used makes a difference, I think Rackspace has multiple endpoint possibilities with varying versions, etc.
I tried a particular file object test using
curl -X HEAD -D - -H "X-Auth-Token: XXXX" https://storage101.dfw1.clouddrive.com/v1/MossoCloudFS_XXXX/path/to/file