They are supposed to work. A few things you can check here:
- Are you on the latest version, alpha.6? (About screen should show this)
- Check your
.config/harbour-whisperfish/harbour-whisperfish.conf, and ensure that you have:
attachment_dir=/home/nemo/.local/share/harbour-whisperfish/storage/attachments
incognito=false
save_attachments=true
Specifically: the path of attachment_dir should exist. The two boolean values, you can change in the settings view.
Let me know whether the above helps, or if you need more help!