Hello, First, I am sorry for my being lazy and not responding to problem reports on teTeX/TeXLive ports in a timely manner. I just updated TeXLive ports to 2014 and trying to figure out what problems we still have now. Please report your trouble to freebsd-tex@ list or file a PR.
I think it is safe to upgrade a system with TL2012. Incompatibilities of TeX engines are quite small though some of very old macros were removed in TL2014. At this moment, TeXLive-specific management tools such as tlmgr do not work well because package management by them conflicts with pkg(8) and can damage the installed files in an unexpected way. -- Hiroki
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