I use Intellij 14 on OSX. Until very recently, my UI appeared normal, but now my menubar (file, edit, view, etc) is part of the main editor UI window, like on Windows and Linux, and not up in the OSX menubar, as normal. The only thing I can attribute this to, is that I accidentally hit some combination of keys and made this change, or it's a result of opening a project for review that already had a .idea folder (received from a user on Windows, potentially with a different version of Intellij, too). I didn't realise there was an existing .idea directory.
I've had a quick look and there are a bunch of files, including a workspace.xml file, but I can't see anything specific which would cause this change.
It's worth noting that the window behaviour has changed, too. If I close the window, it shuts down Intellij, rather than dropping back to the project selection dialogue. This change has affected any project that I open.
Does anybody have any ideas what's happening here?