Mine started doing this today. When it does it I get a little notification to click here to return to dock mode. Then it pops back to normal mode.
It is extremely frustrating.
Now the home screen rotates and I can't stop it from doing it (turning off auto rotate does not work) and it also will launch into speakerphone when I am in the middle of a call.
Any ideas? (Other than a factory reset)
Attached is what shows up in my notification bar when the screen goes to what you see in the picture from OP..