$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.10
Release: 12.10
Codename: quantal
This bug was triggered for me today, running unity 6.10.0-0ubuntu2. Re-launching unity didn't fix it.
I enabled quantal-proposed, cherry-picked the unity install from update-manager (6.12.0-0ubuntu0.2), then re-launched unity and my dock icons returned.
$ uptime
13:51:16 up 24 days, 21:08, 2 users, load average: 0.51, 0.57, 0.54
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.10
Release: 12.10
Codename: quantal
This bug was triggered for me today, running unity 6.10.0-0ubuntu2. Re-launching unity didn't fix it.
I enabled quantal-proposed, cherry-picked the unity install from update-manager (6.12.0- 0ubuntu0. 2), then re-launched unity and my dock icons returned.