Bug#730386: High CPU usage and many little freezes

[dAgeCKo]

Package: gnome-shell
Version: 3.8.4-5
Severity: important
Debian: Testing amd64
Regression: No

Upgrading gnome to 3.8.4-5 resulted in a high consuming gnome-shell (40 
-> 100%) and many little freezes (from half a second up to 3  or 4 
seconds about every seconds).

It is very hard to write a text or to get the focus of a window.

Any information could be provided, if asked.