character is not copied (to clipboard)

[newwaylw]

with Ubuntu 14.10 ( 3.13.0-39-generic #66-Ubuntu x86_64 GNU/Linux )
menu text is not "copied" when clicked, further investigation reveal that
I will have to change:
cb = gtk.Clipboard(selection="PRIMARY")

to

cb = gtk.Clipboard(selection="CLIPBOARD")

[irenegr]

Same issue and solution for Ubuntu 15.04