Now that we've had
a couple of weeks to get used to the idea that Jennifer Aniston and John Mayer are dunzo, again, folks are starting to dish as to what the cause of the break-up was this time around. As we learned a couple of weeks ago,
John apparently broke up with
Jennifer after she returned from a trip to Europe ... but today, we're hearing that it was knows that he is an avid tweeter and does post many times a day. If