It has been my experience over the years that restoring an old home folder onto a new distro hardly ever works without some problems. In your case you are trying to run libreoffice (which has probably been updated between Mint 13 and 14) with old configuration files. Sometimes you get away with it (if the changes are not too great between the two versions) and sometimes you don't.
Your answer is to reinstall libreoffice. It will replace the config files it doesn't like and then work normally again, but you may lose some personal settings you have made in the process.
For the future, there really is no answer because it varies with every installation. The only safe way is to copy over only your own personal documents not the hidden config files within your ~ folder. But having said that I know that in 99 cases out of 100 you can copy over your Firefox and Thunderbird config files pretty well without risk (and probably many others as well).
Like I said there really is no answer, some you win and some you lose.
Fujitsu Lifebook AH532 Laptop. Intel i5 processor, 6Gb ram, Intel HD3000 graphics, Intel Audio/wifi. Realtek RTL8111/8168B Ethernet.Ubuntu12.10 (Unity), Mint14 (Cinnamon), Manjaro (Xfce).