saucy regression: after clicking on any panel applet, keyboard/mouse input lost

Now that (-bug #1180538-) bug #1180638 is fixed, cinnamon session can be started. Everything operates normally until you click on any of the "native" panel applets. Clicking on launchers work as expected, and so is clicking on the application icons docked in the notification area (such as pidgin icon). However, clicking on any "cinnamon native" applet, including menu, opens the applet "bubble", and after that no keyboard or mouse events are honoured, so the desktop becomes non-operational.

This is one of the messages cinnamon emits that looks like it might be related to the problem:

Window manager warning: CurrentTime used to choose focus window; focus window may not be correct.

For completeness, I am including more of cinnamon's output:

$ cinnamon --replace
Gjs-Message: JS LOG: About to start Cinnamon
Gjs-Message: JS LOG: Cinnamon started at Tue Nov 05 2013 23:52:38 GMT+0400 (MSK)
Gjs-Message: JS LOG: network applet: Cannot find connection for active (or connection cannot be read)
Window manager warning: Log level 32: JS WARNING: [/<email address hidden>/applet.js 45]: assignment to undeclared variable schemaSource
Window manager warning: Log level 32: JS WARNING: [/<email address hidden>/applet.js 128]: assignment to undeclared variable worldclocks
Window manager warning: Log level 32: JS WARNING: [/<email address hidden>/applet.js 131]: assignment to undeclared variable i

(cinnamon:22036): St-WARNING **: percentage lengths not currently supported

(cinnamon:22036): Gjs-WARNING **: JS ERROR: TypeError: is null
MyApplet._updateLabel/<@/<email address hidden>/applet.js:315
asyncCallback@/usr/share/gjs-1.0/overrides/Gio.js:87

(cinnamon:22036): Gjs-WARNING **: JS ERROR: TypeError: is null
MyApplet._readOtherDevices/<@/<email address hidden>/applet.js:269
asyncCallback@/usr/share/gjs-1.0/overrides/Gio.js:87

(cinnamon:22036): Gjs-WARNING **: JS ERROR: TypeError: is null
MyApplet._updateLabel/<@/<email address hidden>/applet.js:315
asyncCallback@/usr/share/gjs-1.0/overrides/Gio.js:87

Gjs-Message: JS LOG: network applet: Found connection for active

(cinnamon:22036): St-WARNING **: Did not find color property '-gradient-start'

(cinnamon:22036): St-WARNING **: Did not find color property '-gradient-end'
Window manager warning: CurrentTime used to choose focus window; focus window may not be correct.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: cinnamon 1.7.4-2ubuntu4.1
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
Date: Wed Nov 6 09:55:54 2013
MarkForUpload: True
SourcePackage: cinnamon
UpgradeStatus: Upgraded to saucy on 2013-10-26 (10 days ago)