This is probably because the affected applications (e.g. Skype) start on startup, but are up before unity. See https://bugs.launchpad.net/ubuntu/+source/unity/+bug/765269 comments 3 and 5.
This is probably because the affected applications (e.g. Skype) start on startup, but are up before unity. See https:/ /bugs.launchpad .net/ubuntu/ +source/ unity/+ bug/765269 comments 3 and 5.