Thousands of users of the mobile Scrabble app are furious about recent changes including the new dictionary, deleted player histories and a board that doesn't refresh.
The changes were introduced when Electronic Arts took control of the app from Mattel.
Scrabble players can now customise the board and get rid of advertising by paying for an ad-free version.
But many players commenting on Facebook were less than impressed.
Mattel says the changes have encouraged more people to play the game. But a group for Scrabble players from all over the world has united in protest against the company in a special Facebook group.