You are using Ubuntu 10.04 LTS - the Lucid Lynx - released in April 2010 and supported until April 2013.
using
GNU Emacs 23.1.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1)
of 2010-11-23 on yellow, modified by Debian Copyright (C) 2009 Free Software Foundation, Inc.
every time I put the mouse over the emacs window and/or click on the emacs window.
Also when I switch from a terminal to the emacs window the cursor is put in the toolbar where the icons are.
to get the cursor back where it should be in the first place one needs to click on the menu bar
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