Just upgraded to 3405. In one (and only one) of my IDEA projects, the editor window shows a splitter bar right in the middle. I can't seem to get rid of it. I've tried dragging all the way to either side of the window, but it won't allow me move it all the way to the edge of the window. A screenshot is attached.
Before upgrading to the latest EAP version, I did have the editor split for this particular project. Somehow it looks like the setting got stuck this way.
I've tried the obvious solutions like Unsplit and Unsplit All. I've also tried to create a new split and then unsplit. Nothing fixes the problem.