Thanks @Daniel von Vugt for your comment.
Meanwhile I experienced the issue again with the "Workspace Indicator"
extension not being installed, so this cannot be the culprit in my case. Yet
while trying to switch workspaces I briefly saw again that silly Psensor popup
window "Authentication is
I just had again a similar problem with current Ubuntu and Gnome 3:
mouse left clicks and terminal focus did not work. Alt-F2 including
command input and Alt-tab worked but super-tab did not (maybe I use some
non-standard setting here).
I also had the "Workspace Indicator" (but not
I had the same problem on Ubuntu 12.04.2 LTS, after some package updates (maybe
from 12.10 or 13.04):
Thumbnail preview is broken, CPU load increases with the number of previewable
files in the folder viewed with nautilus.
Just found a solution/workaround here:
I just got the same messages by metacity 1:2.34.1-1ubuntu11, and key bindings
like AltTab for switch_group stopped working.
Downgrading to 2.30.3-0ubuntu8 did not help, and a newer version is not
available for Ubuntu 12.04 as of 2012-08-09.
I ended up removing ~/.gconf/apps/metacity/ and
I wonder why this bug was not yet reported, as suggested above, at
bugzilla.gnome.org.
I've just done this: https://bugzilla.gnome.org/show_bug.cgi?id=658335
** Bug watch added: GNOME Bug Tracker #658335
https://bugzilla.gnome.org/show_bug.cgi?id=658335
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