W910 "Operation failed" bug, when does it start?

[Sa26282]

Hi.
I think it would be nice if all the possessors of a w910 with the "operation failed" bug from games and application menu, usually with not-working "walkman" button, could tell us when this happens.
I have my phone from 1 week when this problem starts, and I have to change it to solve the bug. I don't know exactly when it started, but I'm sure that is just before I transferred some music from pc to phone using SE Media Manager, for the first time. I read someone tells that there are some problems with the connection, and for some bug when you disconnect the phone from USB, even if the transfer is complete and the removal should be safe, some files can be corrupted and the "operation failed" starts. I don't know this is true, I hope to receive considerations and answer, since now I trying to not repeat the some procedure that takes my terminal to this bug, but I don't know what the procedure is.

Sorry for my bad English

Thanks, bye