I think SI should allow us to have a chance to solve the differences between two players. Right now, the only way is to sell one of them. But sometimes, both players are so important to the team and the future of the team, how could I sell one of them? So there should be another way , inthe interation to solve that problem

I tutored Bojan with Eto'o, they were the same personality type, Bojan was describe as a "similar player to Eto'o, and my assistant manager said he would benefit from tutoring. Bojan picked up nothing but a dislike for Eto'o. He had the slight problem indicator, but I wasn't going to get rid of either one. Eventually though, it just went away. I'm thinking around a year later though.

Offering a new contract will usually fix it.

Agreed. What annoys me is the fact that the messages in game say 'if the manager can't sort this out' but then it doesn't give you the option to sort it out.

I had a similar problem, but i remember seeing in the option panel there was a button to slve the players problems/indifferences, and it did and i got a message saying player x and player y have now settled difference or words to those effect.