Comment 37 for bug 777292

I can still reproduce this bug on Ubuntu 12.10, gedit 3.6.1, unity 6.10.0.
But it depends on how I open the initial instance of gedit:

TO REPRODUCE:
1. Close all gedit instances
2. Open gedit from the Unity launcher (and optionally open some files via File > Open, but it makes no difference for what happens next)
3. Open nautilus and double-click a text file -- it opens in a new gedit instance, whereas I would like it to open in a tab in the existing instance

TO NOT REPRODUCE:
1. Close all gedit instances
2. Open nautilus and double-click a text file to launch gedit
3. Go back to nautilus and double-click another text file -- it opens in a tab in the existing gedit instance, as desired

Throughout all of this I am only using a single workspace, and gedit is always maximized.

So it's a mixed-workflow thing, but I seem to use that workflow pretty commonly...