I'm using a new install of Ubuntu 12.04 MATE edition. I'd installed gedit which had been working normally, ie if i did
gedit filename, and gedit was already open, it opened the file in a new tab.
On friday, though, something weird happened and I was logged out. When I logged back in, gedit now always opens a new instance when i do
gedit filename from the terminal. If I'm in Gedit, and open file using the menu, then it makes a new tab.
I did a reboot, and the problem persists. Does anyone know how I can fix this? I only ever want one Gedit open.