I have upgraded from mate 1.2 to 1.4 following the instructions on this post, first week it worked good, only issue was a pc freeze or crash, but only once, on the second week the pc gave me a kernel panic and a couple of issues I didn't had with mate 1.2, so I got fed up, backed up my files and made the painfull job of reinstalling linuxmint again, so my advice to linux newbies or anyone else who might be interested in upgrading to mate 1.4 following this post, is to wait for linuxmint developers to made it available through update manager or prepare yourself to do a little work restoring your pc like it was before
P.S. I want to make clear i'm not blamming anyone I did the upgrade @ my own risk, just a little advice for you folks!
