This one time, I hit Ctrl+Shift+C to start a commit. I got a screen that looked like a splitscreen - on the right is the diff view we're used to, but on the left a SINGLE listview with CHECKBOXES for each file.

What gives? Why did I get that? I thought checkboxes were removed? But there was no staged and unstaged area. Just a SINGLE listview.

Then I got confused so I wanted to see what happens when I re-enter commit mode. So I click Log/History to back out of commit mode and... FREEZE.

Not much to say about it. The app froze completely. Not responding. And after a while: "SourceTree stopped working" (the familiar message from Windows).