Amazon has frozen pre-orders of some Disney DVDs in what appears to be another contract dispute after the online giant began a protracted spat with publisher Hachette Book Group this year.
Physical copies of titles such as Maleficent and Captain America: The Winter Soldier were unavailable for order on Amazon.com.
Digital copies of some of the movies in question as well as other Disney products such as the blockbuster children's movie Frozen were still available for pre-order.
Amazon.com did not immediately respond to a request for comment on the report. A Disney spokesman had no comment.
Amazon has been waging a battle against Hachette, the fourth-largest US book publisher, over the price the online retailer can charge for e-books.
A group called Authors United ran a two-page ad in the New York Times on Sunday, criticising Amazon for halting pre-orders from some Hachette authors and slowing delivery of books by Hachette authors.
Amazon says pricing e-books at $14.99 (£8.93) or $19.99 (£11.91) is too expensive.