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Sources connected with the upcoming movie "Mansion of Blood" tell us, Gary had simply become too difficult to work with -- and was booted from the production after a woman on set complained about inappropriate comments Gary made.

According to sources, Gary had already finished shooting about half of his scenes -- so the script was rewritten ... and another actor filled in to shoot the rest.

Gary's rep tells us, "The situation was plagued by contractual issues and misunderstandings from the outset. Gary considers this episode concluded and has no further comment on the matter."

Reitman -- son of "Ghostbusters" director Ivan Reitman -- filed the divorce papers at L.A. County Superior Court last week.

Jason married writer Michele Lee back in 2004. The two have one daughter together.

Warner Bros. just announced it has "amicably resolved" its dispute with tattoo artist S. Victor Whitmill -- the guy who put the original face tat on Mike Tyson.

Whitmill sued the studio back in April -- claiming WB never asked for permission before they slapped his work on Ed's face ... a gag that proved to be a HUGE plot point in the movie.

The terms of the deal are confidential -- but due to the fact that WB was going to have to digitally alter the tat on Ed's face for the DVD version of the flick if the two sides couldn't reach an agreement, we're guessing Mr. Whitmill's design didn't come cheap.

Father/daughter time is always a good thing.

Law enforcement sources tell TMZ, they've received multiple complaints about construction, noise, and parking problems -- ever since MTV moved into the swanky La Jolla neighborhood.

But we're told, MTV isn't breaking any rules -- cops have checked the house out several times ... and so far, they haven't found a single code violation.

Ward's rep tells TMZ ... Micky was walking his dog Wednesday when a stray got approached and became aggressive. Micky says he tried to get in between the two animals ... when the stray turned him into a a human chew toy.

Micky suffered bites on his arm ... and a MAJOR wound to right index finger -- which was "almost taken off" in the attack. Ward went to the hospital for treatment and is expected remain there until Sunday.

The house is located in the Los Angeles County suburb of Alhambra -- and boasts 5 bedrooms, 4 bathrooms, 3 fireplaces, a solarium, a BASEMENT ... and a three-car garage.

And if the 4,397 sq. ft. house wasn't enough -- it sits on a 17,481 sq. ft. lot ... which includes the backyard arbor built specifically for the film.

Plans are already in motion for a fifth season back in Seaside Heights -- but sources connected with the "Jersey" cast tell TMZ ... Pauly D, Snooki, The Situation and the rest of the gang refused to take part without signing new contracts first.

We're told MTV originally planned to shoot the new season under the terms of the Season 4 contracts -- but lawyers for the cast refused ... so MTV drew up new papers.

We're told the majority of the cast has already re-signed for a bump in salary -- not a HUGE raise, but still significant -- and the rest will sign this week.

Friends of late actress Lana Clarkson were FURIOUS this week when Mamet told the Financial Times, "I don't think [Spector] is guilty. I definitely think there is reasonable doubt ... they should never have sent him away ... If he'd just been a regular citizen, they never would have indicted him."

Now, Clarkson's friends have banded together -- and have fired off a letter to the director, claiming his comments were "mind-boggling and wrong in so many ways."

According to the letter, obtained by TMZ, the group's main concern is that "the loathsome, lying, gun-abusing convicted murderer of our friend Lana Clarkson will be portrayed with some kind of sympathy."

Lana's friends want to remind Mamet -- whose upcoming film stars Al Pacino and Bette Midler -- that Spector was CONVICTED by a jury of his peers ... and plead, "Please refrain from rewriting history for 'creative license.'"

Nader Sherif met Mel at a dinner party in 2007. According to the lawsuit, Nader claims Mel started jawboning him about a Malaysian company called Green Rubber, which developed a technology to devulcanize rubber so old tires could be recycled.

Sherif claims Mel tried convincing him to invest $200,000 in the company -- his entire life savings. Sherif says he was resistant, but someone from the company who was present at the dinner assured him the company would re-purchase Sherif's stock for the full face value whenever Sherif wanted.

But Sherif was still uneasy, telling Mel he had just had a child and could not afford to lose money. Sherif alleges Mel -- who is a "significant investor" in the company -- then told him if the company wouldn't make good, Mel would buy the shares from Sherif for the full $200,000.

Short story -- Sherif was going through hard financial times and wanted Green Rubber to buy his stock back. Sherif claims the company repeatedly refused to do so, and he then went to Mel, who allegedly ignored his demand.

Sherif is suing for $200,000 plus interest. We could not reach Mel's rep for comment.

Charlie is suing Warner Bros. for $100,000,000 claiming the studio had no right to 86 him from the show.

Charlie wanted the judge to rule the arbitration clause in his contract -- which says the dispute would be handled privately, behind closed doors -- is invalid. But the judge said the arbitration agreement is indeed valid, but left it to the arbitrator to decide if the matter would be resolved in private or in a public courtroom. So Charlie can press his request for a public trial to the arbitrator.

J.Lo explained the whole thing to BBC Radio -- saying, "I haven't been forced to make a decision and I'm glad about that because honestly I'm very on the fence about it."

Lopez added -- "I loved it, but I have a lot of other things happening, and it's going to come down to me making a choice of what I want to do for the next year."

One of those "other things" J.Lo is working on is her OWN singing competition show with hubby Marc Anthony -- called "Que 'Viva!: The Chosen". The show will focus on undiscovered vocal talent in Latin America.

FYI -- J.Lo reportedly made $12 MILLION for her role as a judge on AI this season.