This bug was fixed in the package gnome-flashback - 3.14.0-3ubuntu10
--------------- gnome-flashback (3.14.0-3ubuntu10) vivid; urgency=medium
* Disable acceleration check for gnome-flashback-metacity session (LP: #1251281). -- Dmitry Shachnev <email address hidden> Fri, 27 Mar 2015 10:27:10 +0300
This bug was fixed in the package gnome-flashback - 3.14.0-3ubuntu10
---------------
gnome-flashback (3.14.0-3ubuntu10) vivid; urgency=medium
* Disable acceleration check for gnome-flashback -metacity session
(LP: #1251281).
-- Dmitry Shachnev <email address hidden> Fri, 27 Mar 2015 10:27:10 +0300