I originally installed Linux Mint 16 Mate and the later installed Cinnamon 2.0 through Synaptic Package Manager and I've been using it that way for at least 3 months now. I'm still a beginner/noob so maybe there are conflicts that I'm not noticing or that don't really disturb the functionality of the OS. The only noticeable conflict so far is that when I'm logged in under Cinnamon, which used Nemo by default, Caja will open up when I insert USB stick or SD card, but if I click on the home or computer icon on the desktop, then Nemo opens it. Later on while I was logged in under Mate, I was playing around with the Settings, went into Preferred Applications and under the System tab and I noticed that the file manager was set to Caja, which it should be, but for the sake of it, I switched it to Files. So far the conflict seems to be resolved. When I'm in Mate, Caja opens, and when I'm in Cinnamon Nemo opens. As for duplicates, is there any way to check for duplicate? I noticed in the Menu editor and I have 3 Banshee Media Players but only one of them is checked.