On Friday afternoon, in addition to the endless Bill Ackman conference call which pushed the stock lower the longer it dragged on, the stock of troubled pharma Valeant (VRX) was hit with a double whammy when Citron’s “short-seller” Andrew Left tweeted that he planned a new report on Valeant on Monday, following his Oct. 21 report that accused the company of using specialty pharmacies for “phantom sales” to inflate its financial results. In the tweet Friday, he said Citron would “update full story,” adding: “Dirtier than anyone has reported!!”

He may have exaggerated, because as the WSJ reported overnight Left since “pulled back on hints that he would unleash new bombshell revelations Monday about the drug company.”

A bigger problem for Valeant, however, emerged today when none other than Warren Buffett’s right hand man Charlie Munger in an interview with Bloomberg “tore anew into the besieged drug company, calling its practice of acquiring rights to treatments and boosting prices legal but “deeply immoral” and “similar to the worst abuses in for-profit education.” In his role as chairman of Good Samaritan Hospital in Los Angeles, Munger said, “I could see the price gouging.” And speaking as a storied value investor, he said, its strategy isn’t sustainable: “It’s deeply wrong.”

As Bloomberg adds, “Munger’s stance has extra significance, because some of the drugmaker’s largest shareholders follow the style of investing that he and Buffett, 85, popularized. Ackman frequently expresses his admiration for their firm, Berkshire Hathaway Inc. And Valeant’s largest investor, Ruane Cunniff & Goldfarb, which runs the Sequoia Fund, shares a decades-long history with Buffett.”

Munger, 91, brought up Valeant in March, before an audience of about 200 people assembled to hear him at the annual meeting of Daily Journal Corp., where he is chairman. He was discussing a passage in Buffett’s recent letter.

Companies like ITT Corp., Munger said, made money back in the 1960s in an “evil way” by buying businesses with low-quality earnings then playing accounting games to push valuations higher. Investment managers looked the other way. And worse, he added, it was happening again.

“Valeant, the pharmaceutical company, is ITT come back to life,” Munger said at the gathering. “It wasn’t moral the first time. And the second time, it’s not better. And people are enthusiastic about it. I’m holding my nose.”