mini shutters when accelerating??
 

Hi all,

I have a 2011 Mini Cooper hatchback. It's an automatic. About a week ago it started doing something strange. While I'm driving, it will randomly start shuttering, as if it's in the wrong gear. I noticed it usually does it when I accelerate. I got my brake fluid flushed about 2 weeks ago at a Mini dealer and they didn't tell me there was anything wrong so I don't know why this is happening... does anyone have any ideas as to what could be wrong?