Minor bug with the version of libreoffice released with Linux Mint 17.1 Cinnamon. When pasting a selection of text with a slightly different font or style than the main text body, when "ctrl-z" is triggered to undo the paste, the font of the pasted section remains. This forces the user to backspace or manually reset the font/ text style.
*** This bug has been marked as a duplicate of bug 60051 ***