The passages the judge referred to were not specified in open court.
Prosecutors and defense attorneys also debated what the jury should be told about judging Jackson based on the past allegations against him.
Melville said he would tell the jurors they could consider the alleged past acts if they "tend to show intent" on Jackson's part with regard to the crimes with which he is actually charged.
However, the jurors will have to decide whether the allegations of past acts — which never resulted in any criminal charges — were true.
"Evidence has been introduced for the purpose of showing the defendant committed crimes other than those for which he is on trial," the approved instructions read. "This evidence, if believed, may be considered by you only for the limited purpose of deciding if it tends to show a characteristic plan or scheme to commit acts."
Jackson, 46, is charged with molesting the then-13-year-old boy in February or March 2003, giving him wine and conspiring to hold his family captive to get them to rebut a damaging documentary about the pop star.
The judge also ruled jurors will be instructed they can consider witnesses' past criminal activities when considering their testimony.
That includes two employees found to have stolen from Jackson, and the accuser's mother, who took the Fifth and refused to answer questions about allegations she committed welfare fraud and perjury, reports Gonzales. Another witness also took the Fifth, accused in a scheme to secretly record Jackson's conversations with his lawyer on a private flight.
That upset District Attorney Tom Sneddon, who was overhead on a courtroom microphone telling a deputy prosecutor, "We just got screwed."
The closing arguments could be important in this case because of the complexity of the stories the witnesses have told, says Cohen.
"Jurors are going to hear more about patterns — patterns of alleged molestation by Jackson and patterns of alleged extortion and manipulation by the alleged victim and his mother. And of course both sides will hammer away at the credibility of the other side's witnesses, Cohen said.
"If the lawyers are smart they will keep their closing arguments relatively short. Jurors appreciate that and anyway they tend to discount most of what lawyers say anyway, even when the lawyers are really articulate. Less is usually more," added Cohen.
The prosecution's closing argument will be delivered by prosecutor Ron Zonen, not District Attorney Thomas Sneddon, who has become something of a lightning rod or the defense.
That will pair him with lead defense attorney Thomas Mesereau, Jr., and former prosecutor Anne Bremner, a courtroom observer, tells CBS News' The Early Show she's looking forward to the match-up.
"They both have charm. They're both very human. They both connect with witnesses. They both connect with the jury. They're measured, they're logical, they're kind of like Atticus Finch-like lawyers," she said, referring to the hero of "To Kill A Mockingbird."