Comment 0 for bug 1457035

my system:
Ubuntu 14.04.2 LTS x64 (updated)
Release: 14.04

apt-cache policy gedit
gedit:
  Installed: 3.10.4-0ubuntu4
  Candidate: 3.10.4-0ubuntu4
  Version table:
 *** 3.10.4-0ubuntu4 0
        500 http://it.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status

reproducing bug:
open a text file (with some text inside)
highlight some text (e.g. 2-3 lines)
scroll up and / or down

you will notice that the highlighted text will be copy-pasted randomly in your document.

if you can't reproduce the bug this way, try opening a 400 lines .py (python) text file (UTF-8 encoded) with python code inside it.