Customer complains about an issue after a software update. The head of department himself tested the update and got an error message.

Me looking at the logs. Ok, that's an issue, but based on hardware failure, customer should fix his hardware, no relation to the new software.
But surprisingly close to the software update, which piques my curiosity.

Me looking at older logs ... same issue. EVERY FUCKING DAY. For months. The corresponding error message only appears if a user is logged on, so quite a few people have seen it. Obviously nobody cared. Maybe we just ditch error messages, it'll save lots of work.