Bug reported to Gnome at https://bugzilla.gnome.org/show_bug.cgi?id=747924, but it seems to be an Ubuntu-specific issue. I can confirm that the bug is still present on my 14.10 64 bit, I am going to try the ibus-gtk install to see if this resolves the issue. However, Ubuntu can not leave this issue at the users hands to install a random package on their own, this has to be patched, and soon. The bug was reported over half a year ago.
** Bug watch added: GNOME Bug Tracker #747924 https://bugzilla.gnome.org/show_bug.cgi?id=747924 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gedit in Ubuntu. https://bugs.launchpad.net/bugs/1387219 Title: Mouse pointer disappears and cursor stops blinking Status in GtkSourceView Widget: Expired Status in anjuta package in Ubuntu: Confirmed Status in gedit package in Ubuntu: Confirmed Status in ibus package in Ubuntu: Confirmed Bug description: Open gedit. Notice the cursor is blinking. Type a few lines of text. Highilight some of the text. Press <CTRL><c> to cut the text. Notice that the mouse ponter is invisible while hovering over the gedit window. Notice that the gedit cursor is no longer blinking. ***Workaround*** sudo apt-get install ibus-gtk $ uname -a Linux XYZ 3.16.0-23-generic #31-Ubuntu SMP Tue Oct 21 17:56:17 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.10 Release: 14.10 Codename: utopic To manage notifications about this bug go to: https://bugs.launchpad.net/gtksourceview/+bug/1387219/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp