What should happen with Diddy juror?

After the jury started deliberating yesterday, the foreperson quickly sent a note that one of the jurors wasn't following the judge's instructions.  As the lawyers sparred over how the judge should handle the note, Diddy was seen reading "The Power of Positive Thinking."  Maybe it worked!   Later he was seen with "The Happiness Advantage."  

Judges are always too quick to dismiss "problem" jurors.  

What would you do if you were the judge in this situation?